Discuss Eddy current clarification in the UK Electrical Forum area at ElectriciansForums.net
Yes aluminium is a good conductor, so eddy currents will be greater than if it were steel.
Whether in practice anything bad could happen I'm not sure
Seems I am mistaken - thanksUnless I'm very much mistaken the issue of eddy currents only materialise in ferrous materials. Gland plates are often made of aluminium where large singles are brought into an enclosure.
The first picture I assume is steel in which case it is wrong.
You are not mistaken, eddy currents (Foucault currents) will be induced in any conductor within the presence of a changing magnetic field.Seems I am mistaken - thanks
Has anyone found much difference in temperature when it’s only the CPC which goes through a separate hole? Line and neutral conductors going through together.
From memory though doesn’t the reg also say “and the appropriate earthing conductor” should enter through the same hole?
I have to say though, we designed MV and HV switchgear for typical currents of circ 630 - 3000 A and using 1/4" steel plate we used separate apertures for each phase, and only added around 5-10 deg C temperature rise!
I hope you have many 100's amps available in your workshop!I've been meaning to experiment with this for a while, maybe I'll get some time in the workshop soon.
I hope you have many 100's amps available in your workshop!
Not borne out by John Ward's video, or Julie's experience. I'm just perplexed now!Nope, and shouldn't need much current either.
I recall Lucien mentioning that he made a simple square of conduit with a lampholder in the middle of one side and a mains input opposite it which got very warm with the live routed through one side and the neutral through the other with just a 100W lamp in it.
I guess the other side of that is it might add some impedance to the system due to inductance, making the AC R2 a bit higher than the DC one measured during dead testing to verify conductors are properly speced and installed.Yes it does, I think this is down to the fact a lot of current can flow through it under fault conditions.
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