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RCDs in series

Luckysasha · 2018-03-16 08:13:14

Anything wrong with this scenario. 3x6 Cable RCD protected at fuseboard ran to a shed feeding 2 x double sockets with built in RCDs. The cable is swa direct buried across a driveway

Comments

#32 22-03-2018 06:18PM

Bruthal

Closed Accounts Posts: 13,370 ✭✭✭✭

Join Date: October 2008

Posts: 13343

Poulgorm wrote: »

I don't have an RCD on the main board - Just an ELCB.

(Current operated) ELCB is the old abbreviation for RCD, ie, they are the same device.

I thought an ELCB was not effective if you are using a double insulated appliance (no earth wire) - and many electrical tools are like that.

It would be possible for the lead to become damaged for example, and the RCD would minimise the shock risk on a person contacting a damaged phase wire, and earth.

The idea of RCDs on socket circuits is because people regularly use hand held appliances and move them around etc, and they, or their leads can become damaged. Irons are a good example, the leads often end up in a tangled mess over time.

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