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| 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. --- End quote --- 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. --- End quote --- 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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