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B and B+ Type R.C.D.s.

There are so many different types of R.C.D.s available these days. Some are very expensive. I used to like a fully loaded R.C.B.O. consumer unit with A.C. type 30mA R.C.B.O.s. Now it may not be possible to fully comply without spending a lot of cash. And are the newer types of R.C.D. types available as an affordable R.C.B.O. equivilent? Might we revert back to split load consumer units with type A.C. R.C.B.O.s for some circuits and a bank of M.C.B.s on the second half protected by just one type A, F, B or B+ R.C.D?

Quick selection of RCD type
Typical applications Typical loads RCD selection
General applications
(household, commercial, industrial)

Oven, lights Type AC
Dimmer, primary switch mode power supply, multi-speed motors, fan, oven, air conditioning
supplied at 50/60Hz with part of the sinus wave Type A
Extended lighting circuits, computers supply and other lines subject to unwanted tripping Type A-APR
Household appliances and motors with single phase inverters Type F
Industrial applications Motors driven by three-phase inverters Type B
Motors driven by three-phase inverters with very high frequency Type B+

Parents

0 AJJewsbury over 3 years ago

I can not for a moment imagine that a careful person like you Andy, would drive a nail into a cable in a wall, or have a long extension lead supplying your oven.
As it happens that particular oven wasn't at my house, so no guarantees there (I wouldn't trust me anyway, not after the incident with the loppers and the chainsaw flex). The issue with extension leads is that they could be plugged into the socket instead of the oven (it would actually be the closest socket to the back door, and easily accessible with the cupboard door open, so not entirely implausible).
Perhaps we are having too much confidence in R.C.D.s these days. 415.1.2. Run cable in good steel conduit and earth everything well. It worked in the past, why not now?
Certainly if it hadn't been supplied by a soft skinned cable plastered into the wall and via a socket, the RCD could have been omitted …. but as the saying goes, we weren't starting from there.
- Andy.
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0 AJJewsbury over 3 years ago

I can not for a moment imagine that a careful person like you Andy, would drive a nail into a cable in a wall, or have a long extension lead supplying your oven.
As it happens that particular oven wasn't at my house, so no guarantees there (I wouldn't trust me anyway, not after the incident with the loppers and the chainsaw flex). The issue with extension leads is that they could be plugged into the socket instead of the oven (it would actually be the closest socket to the back door, and easily accessible with the cupboard door open, so not entirely implausible).
Perhaps we are having too much confidence in R.C.D.s these days. 415.1.2. Run cable in good steel conduit and earth everything well. It worked in the past, why not now?
Certainly if it hadn't been supplied by a soft skinned cable plastered into the wall and via a socket, the RCD could have been omitted …. but as the saying goes, we weren't starting from there.
- Andy.
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B and B+ Type R.C.D.s.

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