- Reaction score
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Reg 1: Use Common sense.
or it'll be something out of Chapter 3 about discrimination.
yes. i know, but was seeking a specific reg.
531.2.9 only asks for discrimination between RCDs when it is necessary to prevent danger.
Discuss working out volt drop in the Electricians' Talk area at ElectriciansForums.net
Reg 1: Use Common sense.
or it'll be something out of Chapter 3 about discrimination.
I was always taught that the test button mechanically tests the device. I'm not sure about RCBO's.
yes. i know, but was seeking a specific reg.
he is a trainee, i wouldnt be suprised if he is a first year
it sounds like a homework question, if it is its in the wrong section
he mentions mv/a/m on basic domestic circuits so its homework, why would you need to work this out when it gives you all that info in bs7671 and onsite guide if we wanted it
well yes to an extent, it checks the electro-mechanical aspects out, the test button usually switches a resistor from the incoming L terminal to the outgoing N terminal so it checks the trip coil operation too.
That makes sense, but wouldn't cause an upstream device to operate as it only diverts current to neutral so no imbalance would be detected on the other device.
My downstairs sockets at home are fed from a rcbo and I spurred a outside rcd socket off this circuit, now every time I use the outside socket I always push the test button and it has never tripped the upstream rcbo.
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