F
Fennell957
Any help would be massively appreciated.. I have 230v supply to my board.. Switch some mcbs on the voltage drops and other mcbs the voltage reads zero. Any ideas ?
Discuss Help with a fault :) in the UK Electrical Forum area at ElectriciansForums.net
He is in front of his computer or he wouldn't be able to tell us his problem
Yes I checked the polarity at the incomer all ok. Earthing is TNCS. you cannot really follow to other circuits.. As I said when all mcbs are off I have 230 at the mains switch .. Switch 1 or 2 on and it drops lower.. All of them reads 0 v. Turn all off again I have 230 back?Have you checked for correct polarity on the incomer? What type of earthing arrangment do you think is present? Can you follow the voltage through on individual circuits until the end of the ciruit? I think we need more info!
Rich
Changed the mains RCD.. all connections are ok.. Supply Comes straight from the main fuse and in to DB.
Yes I checked the polarity at the incomer all ok. Earthing is TNCS. you cannot really follow to other circuits.. As I said when all mcbs are off I have 230 at the mains switch .. Switch 1 or 2 on and it drops lower.. All of them reads 0 v. Turn all off again I have 230 back?
Do they teach ohms law to elecricans any more?
Stick your test meter across the incoming supply to the consumer unit. Measure the voltage with all loads turned off, turn on some loads and if it ever drops below 216V turn everything off and phone your DNO as there is an upstream fault. It may be a loose connection upstream, but as you have had to ask this kind of question you do need the DNO to help.
Ah ohms law , yes I use it all the time ....The quicker I Finnish the quicker I get ohm....:6:
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