TT system with No RCD

[Risteard]

I have to disagree with you on this. The very should specifically say that the circuit does NOT comply.

It says clearly that "I certify... that the electrical installation work is in accordance with BS 7671:2008 as amended to 2015".

 

[Octopus]

It says clearly that "I certify... that the electrical installation work is in accordance with BS 7671:2008 as amended to 2015".

"except as detailed in Part 1 above"

And in part 1 you add the details. There is the section in Part 2 "comments".


At the end of the day what should a prefessional do?

1. Issue a MWC with notes in Part 1 and Part 2

or

2. Not issue a certificate?


I would rather do 1 above!


If you are saying that ALL certificates state 100% compliance with the regs we better all give up now. Issuing a MWC with a note and comment about a potential fault is the better course of action IMHO.

Just asking for money and ignoring the issue makes us no better than bob from down the pub!

 

[Risteard]

At the end of the day what should a prefessional do?

1. Issue a MWC with notes in Part 1 and Part 2

or

2. Not issue a certificate?

The correct answer is that you should remove the dangerous non-compliance before carrying out the work and certifying it. What you are connecting up is wholly reliant on the fault protection being present for safety, so it cannot be ignored. Likewise we are required to ensure that earthing and bonding are satisfactory before carrying out works.

 

[Octopus]

The correct answer is that you should remove the dangerous non-compliance before carrying out the work and certifying it. What you are connecting up is wholly reliant on the fault protection being present for safety, so it cannot be ignored. Likewise we are required to ensure that earthing and bonding are satisfactory before carrying out works.

I refer you to 1 above. If the people have had a cooker connected in such away for 35 years, they may not accept your view that its not safe and needs improving.

The regs and rules are MAD IMHO.

So you would leave them without a cooker?

Then bob from the pub connects the cooker?

I will continue doing what I do....... a MWC, stating that the circuit doesn't comply is my record of flagging it to the customer...

 

[Risteard]

An Electrical Danger Notice would be more appropriate than a Certificate though!

 

[Octopus]

An Electrical Danger Notice would be more appropriate than a Certificate though!

hum. You are going to need a very big pack if you take that approsch

 

[Risteard]

hum. You are going to need a very big pack if you take that approsch

Perhaps, but you couldn't possibly Certify an installation which has no earth fault protection.

 

[Deleted member 26818]

Does the conection of a cooker fall within the scope of BS7671?
The fact that you would issue an MWEIC, suggests that it does.
Does either the cooker or any cables used to make the connection require ADS?
If either do require ADS, then if it is not already there, it must be provided.

 

[Midwest]

My two pennith, would it not be the Zs that is to be considered?

Reg 411.3.2.4 TT system; each distribution circuit disconnection time not exceeding 1 sec.

Then reg 411.5.4 would give the calculation to give the maximum ZS when using a OCPD giving disconnection time of 1 sec;

Zs x Ia (less than or equal to) Uo x Cmin?

 

[Leesparkykent]

My two pennith, would it not be the Zs that is to be considered?

Reg 411.3.2.4 TT system; each distribution circuit disconnection time not exceeding 1 sec.

Then reg 411.5.4 would give the calculation to give the maximum ZS when using a OCPD giving disconnection time of 1 sec;

Zs x Ia (less than or equal to) Uo x Cmin?

Its a final circuit though. If disconnection is achieved by an OCPD and 411.3.1.2 is adhered to then the maximum disconnection times applicable to a TN system may be used if the circuit doesn't exceed 32A.

 

[Midwest]

Its a final circuit though. If disconnection is achieved by an OCPD and 411.3.1.2 is adhered to then the maximum disconnection times applicable to a TN system may be used if the circuit doesn't exceed 32A.

Ok stand corrected.

PS but does not reg 411.5.4 apply to calculate max Zs when using ocpd on TT?