Protector-Plug Flymo

Most systems though would benefit without this possible source of confusion though

Anyway, remember when one popular way of wiring for TT on a consumer unit - One RCD 100mA time delayed connected for all ways and One RCD fed from that one for only 30mA RCD circuits.

Lighting on the 100mA delayed only and Power on both RCDs

ebee said:

Most systems though would benefit without this possible source of confusion though

Click to expand...

Yes add a plug in rcd if you like when working outdoors

Nothing wrong with it

ebee said:

Anyway, remember when one popular way of wiring for TT on a consumer unit - One RCD 100mA time delayed connected for all ways and One RCD fed from that one for only 30mA RCD circuits.

Lighting on the 100mA delayed only and Power on both RCDs

Click to expand...

Yes the TD rcd upfront is a separate matter to the 2 30ma in series

mikehammer69 said:

Doesn't mean it doesn't provide added security but you won't find it in any electrical design that im aware of

Click to expand...

The caravan maybe?

In the main RCDs increase by a factor of 3, so 10 mA, 30 mA, 100 mA, 300 mA, 500mA, 1 amp, 5 amp. The 300 mA for fire and 30 mA for personal means no all steps are a factor of 3.

As to why on caravan sites we have a 30 mA feeding a 30 mA I would assume in case one is missing.

As to the flymo RCD, still here on table, not binned yet, the lack of test button is interesting, and also the way the shutters seem to press the relay. OK I do have an RCD tester, but I would think that is unusual for a retired electrician, but since I never got the RCD to work, I was never able to test it.



The way the shutter pushed the relay manually in openning only, did seem odd, The N/C contacts which were opened when the plug was inserted made some sense.

But this is the only RCD I have come across where the inserting and removing of the plug did all the testing of the device.

ericmark said:

The caravan maybe?

In the main RCDs increase by a factor of 3, so 10 mA, 30 mA, 100 mA, 300 mA, 500mA, 1 amp, 5 amp. The 300 mA for fire and 30 mA for personal means no all steps are a factor of 3.

As to why on caravan sites we have a 30 mA feeding a 30 mA I would assume in case one is missing.

As to the flymo RCD, still here on table, not binned yet, the lack of test button is interesting, and also the way the shutters seem to press the relay. OK I do have an RCD tester, but I would think that is unusual for a retired electrician, but since I never got the RCD to work, I was never able to test it.

View attachment 421562

The way the shutter pushed the relay manually in openning only, did seem odd, The N/C contacts which were opened when the plug was inserted made some sense.

But this is the only RCD I have come across where the inserting and removing of the plug did all the testing of the device.

Click to expand...

Agree about the caravan although I'm not familiar

It can in theory be connected to an unknown supply so should have its own 30ma protection

Then it most likely gets hooked up to a 30ma protected supply so 2 in series