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BS7671 Amendment 2. Off-peak E7 consumer unit RCD and SPD.

Sparkingchip

Two new consumer units, peak and off-peak each remote from the intake with seventeen metre SWA distribution circuits.

The peak consumer unit will have Type A RCDs and a Surge Protection Device, is the off-peak consumer unit okay with a Type AC RCD and does it need another Surge Protection Device?

Andy.

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  • 0 in reply to Sparkingchip

    As usual that got a little bit more complicated than anticipated. 

    I had to order a BG split load internal tails kit to make the off-peak consumer unit into a split load consumer unit to be able to install the surge protection device upfront of the 30 mA RCD, because BG use crimps that reduce the size of the internal tails to fit into the neutral busbar. 

    I had some 16 and 25 mm Tri-rated cable and crimps with me,  but neither size will fit into the BG neutral busbar, so I had to go online and order a kit to be delivered to me. Whilst I was at it I ordered some spare kits, so I have some to hand now. 

    There's also a "spare" circuit in the off-peak consumer unit, there appears to be another storage heater circuit,  but I have not found the other end of it, I think it's behind some long case Grandfather Clocks that I'm not going to try and move, so I have parked the circuit in the earth bar until another day.

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