Don asks this question, which concerns an EICR, and what code to use in it, depending upon whether the water intake bonding is correct or not. It has been answered by SELECT (Theme – Regulations and Legislation):
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Question: Where an Electrical Installation Condition Report (EICR) is concerned, in this electrical installation the water intake is bonded with 2 x 6mm cables. Note that this installation is of the TN-C type.
I believe that this arrangement is not acceptable, but my customer wants a regulation reference. Could you please confirm which one it is?
Answer: With a periodic inspection, main protective bonding conductors, particularly in a domestic electrical installation, should de identified and their cross sectional areas (CSA) assessed.
If the installation was completed recently, the bonding would normally be 10.00mm - as required by BS 7671 2008 (2011), Regulation 544.1.1, Table 54.8.
If, however, the installation was completed some time ago, it may be that 6mm bonding was acceptable. A coding of (3) may be all that is required on the EICR.
Conductors can be installed in parallel if they are of equal CSA. You should verify that the cables are in parallel and that the cables are not looped to another service.
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