Pat Testing Stuff : 2009/10

[amberleaf]

Re: Section - 301- Questions - Testing ,

This Stuff is for CoP : ( Code of Practice ) Pat Testing . PS this Stuff is up to Date 2009/10
Remember that -&-s can ask you out of Q/As Bank 250◄ . in an Exam

Breakeman . Learning Curve ! PS I will get Back to you . CoP :- Insulation Test . [ p/81 3rd Edition ] its . the Wording !!!!!!!!! 17th Edition :- Insulation Résistance .

The One’s am Down Loading are Ones that will Catch you Out . -&-s . CoP . Put some are the same Principle’s . W.G.B.T.Y. Doing A Quick Job . back about 2/3 .Please do not Down load any more stuff . I will get back to you .Amber [ Jason/Phil will do Hand Stands ]

 

[amberleaf]

Re: Section - 301- Questions - Testing ,

Functional Checks : CoP .

This Final Test is Simply a Check to Ensure that the Item is Functioning Correctly [ Last ] -&-s

When Using a Pat Tester . there is Usually a Facility for Conducting a Load Test which Measures the Power Consumption of the Item when it is Switched on . This is a Useful Test to Identify if an Item is Working to it’s Expected or Full Capacity . This is Particularly Useful for Heating Appliances . for Example . a 1kW Reading on a 2kW Heater may Suggest an Element with an Open Circuit .

Note : ( Tick ) indicates Pass/Satisfactory . ( X ) indicates Fail/Unsatisfactory ( N/A ) indicates not applicable & ( N/C ) not checked : CoP .

Records should Include :
• A Register of all Equipment .
• A Record of Formal Visual Inspections & Tests.
• A Repair Register .
• A Register of Faulty Equipment .

Records should be Maintained throughout the working Life of the Relevant Appliance . along with a Record of its Acquisition and Final Disposal . -&-s

♦ Employees : should not be Allowed to bring Electrical Equipment/Appliance from home into the Workplace .
If they Do . such Equipment/Appliance must be Included in the Inspection/Test Regime before being put to Use at Work & Appropriate Records Maintained .

♦ Once an Electrical Equipment/Appliance is Connected to your System . you are “ Legally Responsible“ to Ensure it is Safe .

Equipment Labels :- if the Appliance has Passed or Failed
On Successful Completion of Tests a Label should be Attached to the Appliance Indicating : p/118

Pass / Green . Safety Check .
- Date of Check .
- Initials .
- Appliance No . [ Appliance Unique Reference Number ]
- Next Test before .

Fail/Red . Safety Check . [ Danger Do Not Use ] ( X )
- Date of Check .
- Initials .
- Appliance No .

Without Adequate Records .” Duty Holders “ Cannot be Certain that the Inspection & Testing has Actually been Carried Out and would not have Documentary Evidence to Prove it . if an Accident should Occur . then Records of Test Results would be Used as “ Evidence in an Investigation and could Prove that you had Done all “ as far as is Reasonably Practical “ to Prevent Danger .

 

[amberleaf]

Re: Section - 301- Questions - Testing ,

Protective Conductor/Touch Current Method :- CoP .

This is an Additional or Complementary Test to the Insulation Test for Instances where the Insulation Test Cannot be Performed or Gives Suspect Results . The Exact Method of Carrying out this Test is a Little Vague in the CoP. & this Alternative Test May Only be Available on the More Expensive & Advanced Pat Testers .

So Rather than Spend Time on this Subject that may Never be Required Under Normal Circumstances .
It would be more Productive to Read Through Section 15.6 – P/76 & Note where Table 15.3
Should a Question Arise on this Section in the 2377 Exam .


-&-s Q/As [ The Protective Conductor Current or Touch Current be Measured within ( 5s ) after the Application of the Test Voltage . the Supply Voltage ↔ " Hint " . & should Not Exceed the Values in Table 15.3 ]

 

[amberleaf]

Re: Section - 301- Questions - Testing ,

A Test for Polarity is Only Required to be Carried Out On Detachable Power Supply Flex and ? [ Extension Leads ]
a) Class 11 hand-Held Appliances .
b) Class 1 hand-Held Appliances .
c) Extension Leads . ↔ Correct Answer .
d) Non-Detachable Flexible Cords

Visual Inspection : p/78
Class 1 / Earth Continuity . Polarity & Insulation .
Class 11 / Polarity & Insulation . [ No Earth ]

3rd Ed . The Reason that the Cord Set is Inspected & Tested Separately from the Appliance is that the Cord Set could be Used During the Course of the Next Period to Supply a Different Appliance .

Example :- if the Cord Set was 2-Core and , During the Year , Was Inadvertently Used to Supply a Class 1 Appliance , the Appliance would be Unearthed and Present a Risk of Electric Shock .

 

[amberleaf]

Re: Section - 301- Questions - Testing ,

i) Class of Equipment ?? ( 1 ) ( 11 )
ii) Mass of Equipment ( kg ) ??? ▼
Portable Appliance’s / p-27 Not More than 18kg ) ▼
Movable Equipment ( Sometimes called Transportable ) 18kg Or Less & Not Fixed ) ▼
Stationary Equipment or Appliance’s ) Stationary Appliance is Equipment that has a Mass Exceeding 18kg

Ps . I Don’t Known Y . This Q/As Pat Testing Came Up . ?? [ Hospitals’ ? Telecommunication’s ? ]

in Order to Reduce the Possibility of Electric Shock through Contact with Live Parts . The Aperture of any Item of Electric Equipment must ?
a) Be Locked at all Times .
b) Only be Opened by the Designated Keyholder
c) Comply with the Requirements’ of BS-EN 20501
d) Meet Test Finger & Test Pin Requirement’s ↔ Correct Answer .

Protection from Hazards :

Protection against Electric Shock & Energy Hazards !!
i) Protection in Operator Access Areas :- [ Adequate Protection by Enclosure . There is No Access to Hazardous Parts ] ( P )
ii) Test by Inspection:- [ Protection is Established by Insulation Materials ] ( P )
iii) Test with Test Finger :- [ No Access to above Mentioned Parts ] ( P )
iv) Test with Test Pin ] No Access to Above Mentioned Parts ] ( P )

Overcurrent and Earth Fault Protection in Primary Circuit’s ( ADS ) RCDs .
Basic Requirements :- [ Earth Fault Protection is to be Provided by Building Installation ] ( P )

Equipment with Earth Leakage Current Exceeding 3.5mA :- [ Cross-Sectional Area ( mm2 ) of Internal Protective Earthing Conductor ]
Warning Label :-


Dad’s Keep in Mind !!! [ Just a Wake Up Call ] Christmas is Just around the Conner ◄◄

“ As with all Electrical Products . Precautions should be Observed during Handling & Use to Prevent Electrical Shock . The Child should be Very Carful while Handling the Power Supply (Adapter(s) ) in Particular Plugging the Power Supply into the Socket-Outlet “ . Etc . DS ….
[ Would a Child Recognises . Damaged/Broken Parts ]

 

[amberleaf]

Re: Section - 301- Questions - Testing ,

● While Conducting an Insulation Test . in Order to Protect the Equipment/Appliance Under Test . it is Important to Connect the ?
a) A Phase & Neutral Conductor’s. [ Remember that it’s Open Book in the Exam . any Qs ) in the Book . -&-s

● 3rd Ed . p/76 Look Up . Number (4) Learning Curve !!
The Phase & Neutral of the Equipment securely Connected Together while making this Test .
This is Best Achieved by Using Pre-Wired Automatically Configured Test Equipment or by Plugging into a Special Test Socket .

Q) An Appliance Cord Set should be ?
A) Labelled & Tested Separately from The Appliance . ( This is what -&-s are Looking For )

Now!! If we Turn or Attention to this Q) CoP .
Observation of Specific Precautions’ are Required on Equipment Possessing a High Protective Conductor Current which is in Excess of 10mA
You would find More Information on how these Types of Equipment are to be Arranged in [ BS-7671 ]

3rd Ed . p/81
Further Precautions need to be Taken for Equipment with a Protective Conductor Current Exceeding 10mA . [ see Section 607 of BS-7671 ]
We are Referred back to the Regulation’s . 17th Edition . 2008 .

What -&-s are looking At ??
For Final Circuits Supplying Number of Sockets Outlets .where it is Known or Reasonably to be Expected that the Total Protective Conductor Current in Normal Service will Exceed 10mA [ Additional Precautions need to be Taken ]

Watch the Wording Please .!! Protective Conductor Current Designed to ► Exceed 3.5mA ◄ ● You are getting Tested on . Being an Competent Person to be a Tester .

Where Equipment has a Protective Conductor Current Designed to Exceed 3.5mA a Label should be Fixed Adjacent to the Equipment’s Primary Connection with the Wording .
a) Warning : High Protective Conductor Current . Earth Connection Essential Connecting the Supply .

● Ps . This is a High Fail One Q/As -&-s

 

[amberleaf]

Re: Section - 301- Questions - Testing ,

Q) A Washing Machine in a Hotel should be Subject to a Formal Visual Inspection every ??

3rd Ed : p/29 - 5.4 [ Stay Focus in the Exam ] Class 1.
A Washing Machine is a Stationary Appliance . [ Mass Exceeding 18kg and Not Provided with a Carrying Handle ]

3rd Ed : Table 7.1 – p/34
i) ( S ) ii) Formal Visual Inspection . Q) Hotel :- (S ) Formal Visual Inspection . [ 24 Mouths ]

Inspection : 7.1
In-Service Inspection and Testing of Equipment are Essential to Ensure Safety , and a Regime of Time and Risk Assessment Based Inspections and Tests should be Implemented . In-Service Inspection’s can Often be Carried Out by the User of the Equipment . and in some Circumstances this may be all that is Necessary , An Ex . of Circumstances where User Inspections may be the Only Inspection Required is in a Low Risk Environment where Class 11 Equipment is Used .

Frequency of Inspection & Testing .
p/35 – ( 3 ) The Equipment Construction ;
* The Safety of Class 1 Appliance is Dependent Upon a Connection with the Earth of the Fixed Electrical Installation [ 17th Edition 2008 ]
If the Flexible Cable is Damaged the Connection with Earth can be Lost .

* If Equipment is Known to be Class 11 and is Used in a Low Risk Environment . such as an “ Office “ Recorded Testing ( but Not Inspection ) may be Omitted

Q) There is No Provision for Protective Earthing or Reliance Upon Installation Conditions for Which One of the Following Equipment /Appliance [
Class 11 :

Q) The Class of Equipment that would be Most Appropriate for Outdoor Use would be .[ Class 11 ]
Q) From the Following list . which Classification & Location of Equipment is Considered to be the Lowest Risk .
Class 11 Equipment /Appliance [ Location / * Office ] Construction Site . Industrial Unit .
Now if we Look at Equipment Use :- 7.1

Class 11 Hotels / Offices & Shops . 7.1 ( S ) ( IT ) ( M ) ( P ) ( H ) Five Categories !!
Class 11 . Combined Inspection & Testing . [ All None ] Formal Visual Inspection ( Yes ) Formal Visual Inspection . 90% of Faults are Found

Q) The User Checks on Portable Equipment Used in an Office should be Carried Out ?
p/34 – 7.1 ( P ) User Checks [ Weekly ] ↔ User Check – Not Recorded Unless a Fault is Found ◄

Q) When Carrying Out a Formal Visual Inspection . it should be Confirmed that the Equipment being Used .
a) In Accordance with the Manufacturer’s Instruction’s
Q) The most Important Check when Assessing the Level of Safety of an Electrical Appliance would be .
a) Visual Inspection .

GOLA .
Q) A Microwave Oven should have Warning’s Concerning Microwave Energy Marked on Relevant Cover to ?
p/106 - V.1.5. - Additional Requirements for Microwave Ovens Covered by the BS-EN 60335-2-25 / Safety Standard : ◄
BS-7671 .
BS-EN 60005-2-25 .
► BS-EN 60355-2-25. Trip up One [ Hint You have to go to Specsavers on this One ] -&-s Will make you Work for that Mark .
► BS-EN 60335-2-25

Q) The Product Standard for Test Probes & Leads is ? [ BS-EN 61010-031 ] P/45 – 10.1.3.

A Portable Appliance Test Instrument May be Used to Test Earth Continuity . Another Test Instrument that could be Used is :
Trip Up One : 1st Choice [ Insulation Tester ] Wrong !! PS. Look at it . Then Look again
Right Choice :- Low Resistance Ohmmeter . 10.3 p/47

15.3 - The Sequence of Testing :- 1) Earth Continuity : 2) Insulation Résistance :

10.3 – p/47 . Earth Continuity Testing may in Certain Circumstances / be Carried Out by a Low Résistance Ohmmeter . ◄ [ Or ] Continuity Range of a Combined Insulation & Continuity Test Instrument [ It’s how they Word it -&-s ]

In The CoP . [ Three Types ] of Inspection & Testing are Recommended . 7.1 .
( Initial Frequency of Inspection & Testing of Equipment )

There’s a High Chance this will Come Up . -&-s Three Types 7.1 .
• User Checks ( No Record is Made if the Equipment is Found to be Satisfactory )
▲ Once an Electrical Appliance is Connected to your System . you are “ Legally Responsible “ to Ensure it is Safe .
• Formal Visual Inspections ( Recorded )
▲ Reveals Approximately 90% of Faults on Portable Appliance’s
• Combined Inspection & Testing ( Recorded ) in Other Words Must be Logged !!
● On this Table we are looking at [ Two Classes of Equipment ] Class 1 / Class 11 .

Earth Continuity Test :- Lead if the Connection’s are Good ,. The Résistance of the Circuit will be ( Low )

 

[amberleaf]

Re: Section - 301- Questions - Testing ,

This is a Prime Example :

Q) Which One of the Following will Not Affect the Frequency of Inspection & Testing for an Electrical Appliance .
A) The Integrity of the Fixed Electrical Installation . [ as an Competent Person / Pat Tester ] You will Check the Appliance . Class1 – Pass / Fail
Continuity / Polarity : Earth is you First Line of Defence .

What should be Maintained ?

All Electrical Systems & Equipment should be Maintained if “ DANGER “ would Otherwise Arise
Guidance on the Inspection & Testing of :-
Portable . Movable & Hand/Held Tools . & Equipment ; Equipment Connected by MEANS of a Cable or Cord Connected to an Outlet Plate ;
Appliance’s to Build in ; IT Equipment ; Extension Leads ; Multiway Adaptor’s & Suppressor Adapter’s .

Plug . Socket Outlet :- Kettle / Computer / Iron / Grinder / Extension Lead – Gig – Saw . …… Etc .
Example . Fuse Spur ? [ The Integrity of the Fixed Electrical Installation ]
Air Conditioning Unit / Hand Dryer / Washing Machines / …… Etc .

Other than the Fixed Installation .][ all Electrical Equipment in an Installation . Whether Permanently Connected or Connected by Plug & Socket Outlet . should be Inspected & Tested in Accordance with the Recommendations Contained in this Code of Practice .

The fixed Installation should be Periodically Inspected & Tested to Ensure Satisfactory Condition for Continued Use as Required by BS-7671:2008

Inspection & Testing of Fixed Electrical Installation is Given in Guidance Note 3 [ Inspection & Testing ]

 

[amberleaf]

Re: Section - 301- Questions - Testing ,

MORE. PAT Testing STUFF :

The First thing your Tutor will show you is :- A Quick Run Down on This Mater . “ Learning Curve “

1) Visual Inspection :

First Check the Socket on Wall [ Visual ] Then With a Plug in Continuity/Polarity Plug [ Test it ] Ok . A Must ◄ [ Don’t Do Hand Stands Just Yet ]
You are Checking the Fixed Installation Wiring . [ Continuity/Polarity Plug ]

15.3 : In-Service Tests . [ There’s a Reason for Me Writing all This . to Give you a Fighting Change ]
1) Earth Continuity Test .
2) Insulation Résistance Test .
Remember that the 4) Functional Test is Last :

► Q) Class 1 Kettle : What is it ? [ p/27 – 5.1 ( P ) Portable Appliance . PS you will be Asked !!!!!!!!!!!! by the Tutor .

1) Visual Inspection :
• Cord :- Run your Hand along The Cable/Flex . Ok ……… [ No Lump’s or Bump’s ……. Etc
• Open the Plug :- BS-1363 . Ok ……. ……………………[ Standard 3/13A Plug is Fitted with a Fuse in Order to ? Protect the Flexible Cord ]
• Check for any Loose Strands’ of Cable’s Ok [ 700W = 3A . so the Next One to Use is 13A – Looking at The Plate on the Kettle [ 1200W ]

i) PS . It Must have the Asta Mark Showing Ok
ii) Fuse Must be to BS-1362 Ok iii) Take Out the Fuse from the Plug [ Why ? Continuity Tester to Check that it is Working Ok . A Must ◄ ]
iv) Check the Cord Grip / On the Sheath of the Cable Ok . A Must ◄

Now this Brings Us to the Point :-
Calculator’s Out ……………. [ -&-s are giving you Calculator Now ] For you Exam Only
p/73 – 15.4 . Earth Continuity Test / 1.5 Times the Rating of the Fuse [ 1.5 x 13A = 19.5A ] Are we Focus ?? ?? ( 26A ) ” Hard Test “
- 1.5 x 3A = 4.5A
- 1.5 x 13A = 19.5A [ You are within Tolerance ]

[ First Visual Inspection ] Ok . A Must ◄

The Earth Continuity Test :
1) Tester Set on Continuity . Plug the Kettle Lead into the Tester / Socket . Next Clamp the Earth Bond Lead onto the Kettle Element / or the Metal part of the Body . [ Kettle had a Base Plate / Floating Kettle ] Off you Go .
Test Readings :- 0.08Ω ] Now Did we Pass !!! [ Hint : Is it ↔ Higher than 1.0Ω / No [ Pass ] ………. Read this Carefully
p/74 – 15.1 . ( 0.1 + R ) Ω where R is the Résistance of the Protective Conductor of the Supply Cord .

2) Insulation Resistance Test :
[ First Visual Inspection ] Ok . A Must ◄ Say this Kettle is Two-Years Old
Tester Set on Insulation Résistance Test . ▼ [ Power Switch put in the ON Position Kettle ]
p/75 – 15.2 :- All Other Class 1 Equipment 1.0MΩ . [ Household ]
500V d.c. - Test Results ≥ 19.99MΩ [ Now Did we Pass !!! [ Hint : Is it ↔ Higher than 1.0MΩ / Yes [ Pass ] ………. Read this Carefully
PS . if Lower that 1.0MΩ . [ Fail ]

PS. This will Come Up -&-s ; a Must !!!!!!!!!!!!
Combined Inspection & Testing .
Q) An Earth Continuity Test on ( 22m ) Extension Lead having a Core Area of ( 2.5mm2 ) Would Produce a Result of Approximately ?
a) 0.017Ω .
b) 0.176Ω . Take you best Shot .
c) 0.821Ω
d) 8.00Ω

Table V11.1 – p/124
First look at ( mm2 ) 2.5 . move along to ( mΩ/m 8mΩ ). [ 8mΩ/m x 22m = 176 ÷ 1000 = 0.176 ]

An Insulation Résistance Test on a Class 1 Appliance gives a Test Result of 0.02MΩ . V/R = I .
If the Appliance is Connected to a 230V Supply the Value of the Current that would Leak to Earth would be ? 230V ÷ 0.02MΩ = 11500 . [ 11.5mA

An Extension Lead has a Cross-Sectional Area ( CSA ) of 1.5mm2 & a Length of 14m . A Earth Continuity Reading should give a Result of Approximately ?
a) 13.3mΩ
b) 19mΩ
c) 0.1862Ω
d) 186.2Ω

Table V11.1 – p/124
First look at ( mm2 ) 1.5mm2 . move along to ( mΩ/m 13.3mΩ ). [ 13.3mΩ/m x 14m = 186.2 ÷ 1000 = 0.1862 ]

First Some Points To Look At .
Table VIII.1 . continued p/127 Top Page .
Note :- that Certain IT Equipment is Fitted with a 5A Fuse & this Fuse should Not be Replaced by one of a Different Value ◄◄ -&-s Trip Up One .
Note :- If The Manufacture’s Say 2A it is 2A . You Must Obey ◄► The Manufacture’s / The CoP Does Not Have a SAY in This Matter ◄◄

 

[amberleaf]

Re: Section - 301- Questions - Testing ,

Level 3 Code of Practice for In-Service 2009/10
Inspection & Testing of Electrical Equipment .

What is Electricity ?
Electricity is a Form of Energy
Energy is a Force that can be Converted to One Form or another but Cannot be Created or Destroyed . The Following Definitions are Necessary to Understand Electricity & Electric Theory .

Electric Current :
This is the Flow of Electrons , or more Precisely the Flow of Negative Charge . The Rate of this flow of Charge is Measured in Amperes ( Amps )

Voltage :
Electromotive Force is the Imbalance of Electrons on Two-Parts of the Circuit . Which Causes the Flow . it is Sometimes ( Referred ) to as the Potential Difference . The Unit of Measurement of ( EMF ) is the Volt .

Power :
This is the Rate at which Energy is Transferred . [ Power = Voltage x Current ]

Résistance :
The Opposition of the Circuit to the Flow of Current .

Ohms Law :
This is a Statement for the Basic Relationship between [ Current . Voltage . & Résistance ]

Ohms Law :-
A Simple Relationship exists between the Current flowing through a Résistance & the Voltage across it .
This Relationship is Called Ohms Law . and can be Expressed as :-

[ I = V/R ]
I = Current Measured in Amps :
V = Voltage Measured in Volts :
R = Résistance Measured in Ohms :

Example :- I =V/R . i.e. I = 12V ÷ 6Ω = 2A

 

[amberleaf]

Re: Section - 301- Questions - Testing ,

I must Bring your Attention To the Fact . That there is Experienced Member’s ’ on Pat Testing in The Forum .
Please Take This Chance of Getting Advice “ FREE “

There are Discussion Sessions where Experienced Member’s will Share and Discuss Pat Testing Issues .
Use there Shared Knowledge “ New Information “ Etc .

When Old Amber is Stuck . I’ll will Use there Expertise which is Second to None . First Class Chap’s . [ its Free.Free. Free . ]

 

[amberleaf]

Re: Section - 301- Questions - Testing ,

This One . It’s the Wording .

p/60 11.3 . Class 111
The Classification Mark in the Diagram if Found on an Item of Equipment . This Item must have ????? [ The Wording ]
a) Metal Casing .
b) SELV Supply .
c) An Earth Connection .
d) No Earth Connection . ↔ Correct Answer . [ This is a Good One -&-s Like to Use ]

 

[amberleaf]

Re: Section - 301- Questions - Testing ,

Ohm’s Law
In the Atomic Theory Section we saw that an Applied Voltage Causes Current flow in a Conductor when a Load is Connected . There is a Third Component that Affects Voltage & Current and this is Called Résistance

The Relationship between Voltage . Résistance & Current can be Likened to a Water Tank . [ Water Pipe & Tap ]

With the Tap Closed the Body of Water in the Tank Exerts a Downward Force or Pressure . This can be Likened to Electrical Voltage .

The Water Pipe Offers Résistance as there is Only so Much Water that can Enter the Pipe at any One Time due to its Relatively small Size . This is Similar to Electrical Résistance .

Finally . When the Tap is Turned on the Water will Flow because it is “ Pushed “ by the Water Pressure through the Résistance of the Pipe . This flow of Water Linked may to Likened to Electrical Current .

Ohm’s Law : States that the Voltage in a d.c. [ Direct Current ] Circuit is Equal to the Product of the Current & the Résistance . [ V = I x R ]
Where . V = Voltage ( Volts { V })
I – Current { Amperes { A })
& R = Résistance { Ohms { Ω })

V. Volts / R. Ohms / I . Amperes .

If the Current flowing in the Circuit is [ 100A ] & the Résistance is [ 0.1Ω ] find the Voltage .
Voltage = Current x Résistance .
V = I x R ……. [ 100 x 0.1 = 10 Volts ]

By Manipulating or “ Transposing “ the Base Formula we can also find Current or Résistance Respectively . Visualise Ohms Law in a Triangle .

As we already know [ V = I x R ] If we Cover up the ( V ) in the Triangle .
What are you Left with ? …. I/R ( I x R ) Therefore V = I x R .
The same Applies if we Want to Find the Current . Current is Designated by the Letter [ I ] so Cover up the [ I ] in the Triangle . Yeah !!

 

[amberleaf]

[ This is Only Used as an Guide Line Only ] “ Cooker “

(1) Testing Equipment Permanently Wired to Supply :
This should only be carried out by a Person Competent to work on the Fixed Electrical Installation

The Supply to the Equipment Circuit must be . Isolated . Secured “ Off “ and Proved “ Dead “ Additional Measures may be Necessary to Prevent Unintentional Re-energisation Prior to & During Inspection & Testing .

The Means of Connecting the Equipment to Wiring of the Fixed Installation may then be Exposed by Removing the Cover of the Fused Connection Unit or Similar Outlet . Providing an Isolating Point for Disconnecting the Equipment to be Inspected & Tested Using a Portable Appliance Tester or Other Suitable Instrument .

The Leads must be Insulated for the Test Voltages’ to be Applied and be Suitable Positioned whilst Performing the Test : [ Leads Fused ] ◄ i.e.
Including Control of the Working Area to Prevent them being “ Touched “ During Testing .

Class 1 Equipment :- Continuity Testing
Connect the Earth Bond Lead from the PAT Instrument to the Conductive Casing on the Equipment to be Tested . Another Suitable Flexible Lead can be Connected between the Earth Contact of the Integral ( 13A Socket on the PAT Instrument Via the ( Earth ) Pin of a Suitable Plug and the Temporary Exposed Earth ( E ) Terminal of the Fixed Wiring in the Outlet .

“ Cooker “ [ Mains Voltage .230V ] Danger Live Power : Must be Isolated ●

Outlet Supplying Fixed Equipment ]
Mains Supply Isolated Prior to Performing Test ] ◄ [ Do Not Cut Power unless you are Trained to Do So ] Competent Person
▼ Connecting Mains Cable 230V
Earth Bond Leads Connected from Test Apparatus to Fixed Outlet on Building Structure & Equipment .
i) Lead onto the Isolators’ Earth in side of the Isolator .
ii) Lead onto the Casing off the Appliance . Body .

“ On Completion of Continuity Testing . The Earth Bond Leads must be Removed “

(2) Testing Equipment Permanently Wired to Supply :
The PAT Instrument Test Leads should be Connected to Apply the Test Voltage between the Line ( L ) and Neutral ( N ) Terminals Strapped Together on the “ Load Side “ of the Local Isolation Point . and the Earth Terminal at that Point . The Insulation Résistance should be Recorded .
The “ Leakage Method “ of Determining Quality of Insulation could be Used as an Alternative .

Outlet Supplying Fixed Equipment ]
Mains Supply Isolated Prior to Performing Test ] ◄ [ Do Not Cut Power unless you are Trained to Do So ] Competent Person
▼ Connecting Mains Cable 230V

Leads from Test Apparatus Connected between Line ( L ) and Neutral ( N ) Terminals Bridged Together and Earth ( E ) Terminal within Outlet .
Class 1 Equipment to be Tested with [ Integral Switch(es) “ ON “

“ On Completion of Testing . The Connections within The Outlet must be Correctly Re-fixed and the Cover Replaced before Re-Connecting the Supply “

Fixed Installation’s :
It will Serve No Useful Purpose is Safe and Sound Electrical Appliances or Other Apparatus are Plugged in or Otherwise Connected to a Fixed Installation which does not have Effective Earthing .

● The Safety of the Fixed Installation should Comply with BS-7671:2008 Requirements for Electrical Installations { IEE Wiring Regulation’s ]
Its Condition should be Periodically Verified by a Suitably Qualified Electrically Competent Person

● The Fundamental Requirement for Protection against Electrical Shock if Exposed-Conductive-Parts of Class1 Equipment becomes Live due to Fault Conditions . is to Interrupt The Supply as Rapidly as Possible to Prevent Danger .

● This Requires a Good Low Résistance Earth Path back to the Source of Supply to Produce Sufficient Current & Ensue the RCD will Operate Rapidly
RCDs 17th Edition .
You will still get Old Installation 16th Edition [ Circuit / Breakers ]

 

[amberleaf]

Re: Section - 301- Questions - Testing ,

CoP : Exam . Please Read
The Exam Nowadays have came a Long Way on the 3rd Edition from -&-s point of Valve’s

May I Bring up the Point On this Matter . 19.10.2010
► Out of a Class of [ Five ] I was the Only One that “ Passed 2377-200 “ This may be a Good point to Use the Forum and ask the Expertise of the PAT Testing Advise on Matter Relating to Pat Testing .

-&-s : [ Examination Score Report 2010 ; 1500/1600 ] Learning Curve !! ◄◄
Equipment Construction . 83.3%
Inspection . 66.7%
Combined Inspection & Testing 100.0%
Recording and Use of Instrument’s . 66.7%
Equipment . 100.0%
Your are Reaching for More if you Can To the “ Pass Level % “
Please . Use this as an Guild Line !!!!!!! [ Passed ] -&-s Amber

The Wording has Altered Very “ Dramatically -&- 2009/10
Six Questions . on Class 11 Stuff . Not Simple Ones ??? CoP . p/V Equipment Constructions . ( 7 ) Items’ on Class 11 but a Few ……..

Q) if you get an Item of Equipment more than 12mA . What would you DO ??? High Protective Conductor Current ???
Go for the CoP. p/81 ?? [ be Permanently Wired to the Fixed Installation. Or be supplied by an Industrial Plug & Socket to BS-EN 60309-2 ?????? ]
Go for BS-7671 . 543.7 ?? Seek Advice .
● Or would you Take it out of Commission . as it being to High ????????? to put in Use . This would be your Call as an “ Competent Person “

That PASS MARK means a Lot . [ Study Hard ]

Q) You have to ask the Permission of the Person to Switch OFF Equipment ? Computer’s
2010 / You have to ask the Permission of the [ USER ] the Wording .
​