testing assessment

[james king]

can every one please ask sum Qs that they have had on there assessment i will try to asnewr to best abilty thannks.

 

[acat]

What are the RCD disconnection times

How deep is the chase in a wall vertical

How high up from the worktop should the middle of the socket be

How close to a sink can you have a socket

Good luck


Chris

 

[Sintra]

What are your disconnection times for circuits on different systems ie TT TNS TNCS.
Do you need to earth a metal back box.
What is basic protection.
What is fault protection.
What are the zones in a bath or shower room.
What are exposed and extraneous conductive parts.

 

[Des 56]

What are the steps for safe isolation
In a radial circyuit with a number of outlets where would you measure R1+R2
State 4 situations that require 30 m/amp Rcd

 

[mikex79]

what assessment are these questions for?
cheers

 

[acat]

They are for the competent person scheme and are the questions that anyone of them could ask you.





Chris

 

[ezzzekiel]

where is the kettle and can you make tea




find that they are mostly helpful and not trying to trip you up and have never had a problem but i have heard reports of some inspectors being up themselves.

 

[james king]

What are the RCD disconnection times

How deep is the chase in a wall vertical

How high up from the worktop should the middle of the socket be

How close to a sink can you have a socket

Good luck


Chris

not sure on rcd times as have lost regs book.

i would use 50mm as is enuf room for trunking and any other protection

for the work top i would say 200mm - 150mm please tell me if i am wrong thanks

What are the steps for safe isolation
In a radial circyuit with a number of outlets where would you measure R1+R2
State 4 situations that require 30 m/amp Rcd

the steps of isolation.

1st visual check of out side eg board

turn off sullp befor taking of cover

test for dead supply

test ur tester on a proving unit

re test suply

lock off rcd

do all tests eg r1+r2 IR test but putting cover back on board each time u leave it to go the the sockets ect

live test lalala i think it is correct please say if not


r1+r2 = making a connection at the CU between live and earth sat metre to ohms and test at sockets highting reading note down.

as for the rcd protection i just protect every ciruit with oneno matter what

shower tt systems need one ??

What are your disconnection times for circuits on different systems ie TT TNS TNCS.
Do you need to earth a metal back box.
What is basic protection.
What is fault protection.
What are the zones in a bath or shower room.
What are exposed and extraneous conductive parts.

as for the back box. i think u use to have to do it but the regs state now u do not. imm not to sure on that tho i have been told u do nopt have to.

basic potection is protection agaist electric shock under fault free
fault protection is same but with single fault condition i think.

zone are 0 1 2 out side zone

0 is with in side bath or shwer
1 in stil with in bath or shower but cant remeber the hight
2 is 0.6 out side zone 1
out side is any thing from 2.25m

exposed can become live under fault condition
extaneous not no how to word this lol

if not correct please say

 

[acat]

Back to the books Im afraid James you will need a copy of the OSG and Guide to the Building Regs write down the questions find and learn the answers. You wont be expected to know it all but you will be expected to know where to find it.

Answer to chases page 120 of building regs vertical chases not deeper than one third of the wall thickness horizontal no deeper than one sixth of wall thickness.

Its not as bad as people make out most testers will nudge you in the right direction dont forget they want you to pass its not good for them if everyone fails and make sure you have the kettle on



Good luck

Chris

 

[james king]

as i said i do have ong but i just wanted to tell u off top of my head i will read ll the books not got building regs tho i kniw were to find most things do u think off top off my head knowlege was ok or not?

any info on the back as wondered that for a while??

ans also sink depths please as is a lot easyer to find out on here??

 

[acat]

Centre of socket 150mm above surface closest to sink 300mm looking at your other answers not all correct either safe isolation is a must you need to know that better than yourself.

1 Test tester battery check
2 Test tester known supply or proving device
3 Test circuit to be isolated
4 Switch off appropriate MCB
5 Lock off MCB
6 Put key in pocket
7 Re test circuit
8 Label fuse board
9 Disconnect neutral of circuit
10 Tape amd place out of reach
11 Re test tester know supply or proving unit

This is what we were taught Ive added 1a zero meter leads as a lot of people forget that.

Chris

 

[james king]

was n not taught to place out of reach. what shel i do if i have no proving unit?

 

[acat]

When is your assessment and who is it with. You really need a proving unit to make testing your meter easy the examiner will ask how do you know if your meter is accurate if you havent tested it on a proving unit. Building Regs ISBN 978 0 86341 862 4 get copy and learn chapters 1 5 and 10 as best you can. OSG ISBN 978 0 86341 854 9 is required as you will need to refer to that during the assessment.



Chris

 

[james king]

i have all books part from building regs my dad may have one tho. essessment in couple weeks with napit. all testing is ok know how to do them reasonably well just most questions i am not fresh on? just need a guide on whatthey ask so i can revise my --- off i ask pll on here because it is very help full and easyer than using regs book i get to talk to ppl who is already approved with is better than any book u can read even tho i ask silly question lol just wan to know exact asnwer?

do u have to earth back boxs? as i said i dont think u do any more

 

[acat]

No question is ever silly it is better to ask than think you know and get it wrong especially if you end up touching live cables.

Dont know the actual answer to the back box but I would say yes and if the examiner asked me why the answer I would give is if the cable is damaged and the copper of that cable is touching the back box I become the earth if I touch it. Might be wrong but I would rather be alive and stupid than dead smart.

Chris