Old three phase wiring was red, blue, yellow.
most youngsters wouldnt know how bell it out was named or what it is years ago most firms only had 1 megger and an avo meter to test they gave everone else a doorbell and a battery with leads fitted if you got the right leads end to end or a circuit the bell rang was often used on making pyro cables up as the cores wernt marked up in the pot and you had to sleeve the live when you found itGet a photo of motor or contactor connections then bell them back to the cables in your hand.
Nope. Earth & Ground are the same (Ground for you Colonial Chaps )Neutral or ground ?
Or are they the same ?
Technically the Neutral does go to earth back at the power stationNope. Earth & Ground are the same (Ground for you Colonial Chaps )
Technically the Neutral does go to earth back at the power station
You do get generators where the isn't bonded to Earth. I think some inverters also - but in general I take your pointTechnically the Neutral does go to earth back at the power station
Earth/Ground is generally a safety item (certainly over here anyway, I’d assume over in US too?), whereas neutral would be a part of the main circuit. So as such yes, you wouldn’t expect to see current flowing in normal circumstances in the earth, but you would in the neutral wire.My sparky friends explained to me that we cannot do that anymore (neutral & ground the same) as the code
says something about current is not allowed to flow in the ground wire under normal operation.
If you do not have N-E linked, then it's possible to have a potential voltage (& current) flowing between N & E). Apart from anything else, in the UK all (Domestic) Distribution Boards employ Residual Current Devices (RCD's) aka Earth Leakage Protection rated at 30mA... so any current flow to Earth (Ground) e.g. someone getting a belt, faulty insulation or appliance, incorrectly wired etc trips the Supply within 30mS.My sparky friends explained to me that we cannot do that anymore (neutral & ground the same) as the code
says something about current is not allowed to flow in the ground wire under normal operation.
They don't do it that way in the States... they have something called Old SparkyIf you do not have N-E linked, then it's possible to have a potential voltage (& current) flowing between N & E). Apart from anything else, in the UK all (Domestic) Distribution Boards employ Residual Current Devices (RCD's) aka Earth Leakage Protection rated at 30mA... so any current flow to Earth (Ground) e.g. someone getting a belt, faulty insulation or appliance, incorrectly wired etc trips the Supply within 30mS.
With no N-E link to ensure zero-volts between Neutral & Earth you'd get nuisance tripping of the RCD & no power.