EICR - main earth and neutral

davezawadi (David Stone):

Which page of BS7671 permits split con on the consumer's side of the meter, or under BS7671 at all? It is probably not dangerous but is not protected, the sheath does not provide much mechanical protection to the very weak N insulation, terminating the centre aluminium conductor may be difficult because of corrosion/bimettalic consideration etc. I can find no reference to BS7870 in BS7671.

Chapter 52 does not mandate any particular list of standards for cables. Not all possible cable types are listed in BS 7671 - and even the tables that are provided don't have enough information to fully design with all of the cable types listed (e.g. armour CSA for SWA types, unusual installation methods such as sheathed cables in conduit, etc.).


At least this has a British Standard for the cable construction, so there should be no issue there ... provided it meets CPR fire performance requirements ?


So, provided it's deemed to meet the external influences requirements (some examples you've stated, perhaps), there should be no problem ... but as John says this may be BNO and outside the scope of BS 7671 as it's possibly distributor's equipment ?

davezawadi (David Stone):

Which page of BS7671 permits split con on the consumer's side of the meter, or under BS7671 at all? It is probably not dangerous but is not protected, the sheath does not provide much mechanical protection to the very weak N insulation, terminating the centre aluminium conductor may be difficult because of corrosion/bimettalic consideration etc. I can find no reference to BS7870 in BS7671.

Chapter 52 does not mandate any particular list of standards for cables. Not all possible cable types are listed in BS 7671 - and even the tables that are provided don't have enough information to fully design with all of the cable types listed (e.g. armour CSA for SWA types, unusual installation methods such as sheathed cables in conduit, etc.).


At least this has a British Standard for the cable construction, so there should be no issue there ... provided it meets CPR fire performance requirements ?


So, provided it's deemed to meet the external influences requirements (some examples you've stated, perhaps), there should be no problem ... but as John says this may be BNO and outside the scope of BS 7671 as it's possibly distributor's equipment ?