General > General Technical Chat
Post a picture of your Fuse Box
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Monkeh:

--- Quote from: mikeselectricstuff on October 07, 2022, 10:58:38 pm ---
--- Quote from: Gyro on October 07, 2022, 10:36:34 pm ---
--- Quote from: mikeselectricstuff on October 07, 2022, 10:11:46 pm ---... the MCB on the left feeds a secondary board in the workshop, so no RCD as it has RCBOs at the far end...

--- End quote ---

As long as the output cable has suplimentary protection, ie. armoured cable, with grounded armouring - as you have done.

--- End quote ---
Yes, it's armoured.
If it did have an RCD at the feed end, it should be one with a higher trip current than at the far end to ensure selectivity, i.e. the RCD closest to the load should trip first. Not sure if this is a requirement or a recommendation, as it's mostly an inconvenience thing rather than safety

--- End quote ---

It could be (should be) considered a safety issue if the lack of selectivity causes a loss of lighting with no emergency lighting provision (which domestic properties don't have).
themadhippy:

--- Quote ---It could be (should be) considered a safety issue if the lack of selectivity causes a loss of lighting with no emergency lighting provision (which domestic properties don't have)
--- End quote ---
But lighting circuits are now required to have rcd protection. welcome to one of the regs catch 22's

--- Quote ---If it did have an RCD at the feed end, it should be one with a higher trip current than at the far end to ensure selectivity,
--- End quote ---
You  want a  time delayed  device at the supply end  as the fault current will be seen by both devices and the fastest will win .
jonovid:

--- Quote from: Circlotron on October 07, 2022, 12:45:06 pm ---Occasionally you see pics like the following. Will be interesting to see if someone from a country that doesn't appear to have standards and regulations posts what their fuse box looks like.



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looks like some Asian cable TV providers may provide free phantom mains power in a heavy rainfall :o
AVGresponding:

--- Quote from: themadhippy on October 07, 2022, 09:50:26 pm ---
--- Quote ---Those must be really old installations.
--- End quote ---
nope,thers even a piccy of such a beast by wylex  earlier in this thread, they were still being installed upto the 90's and  still plenty of them  in use

--- Quote ---I rarely use a torque screwdriver,
--- End quote ---
In the uk " electrical equipment shall be installed in accordance with the instructions provided by the manufacturer of the equipment" so if they give a torque spec your expected to follow it.

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Yes, I know. In practice, it often doesn't happen. Even when torque drivers are used, in my experience they don't get calibrated every year anyway.
TopLoser:
3 floors, 450m2, 20+ rooms served by this. On the list of things to sort out…
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