Questions and electrical advice in the Commercial Electrical Advice - Discussions on Three Phase Supplies, three phase machinery and motors, DOL starters, phase sequence, running steel conduit, trunking and other questions on industrial and commercial electrical installations and maintenance. Commercial Electrical Talk. Also notice our Electrical Advice Forum and our Industrial Electrical Forum.

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Hi all, Could someone please help with a query I have? At a factory I work in, we get a lot of damaged motors (due to it being a very wet...
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Engineer54
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I am trying to find out why an air master tiger 14/60 turbo air compressor keeps blowing the 13amp fuse. MCB does not trip when this happens...
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Bobeto
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Just out of interest what current does an AC Contactor coil take? I keep using 300va transformers in my panel builds but never take coil currents...
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Machine uses total power of 75kva. 22kw. 3 phase. What size cable will I need for this machine?
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Geordie Spark
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Well I was looking over some pictures on my camera, and came across these photos of a job where we needed to spike a cable. They were taken on...
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Paul Tuson
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I have been through a time served electrical apprenticeship, achieved LV 3 2330, AM2, NVQ, and all other stuff to do with, 6 years ago. I do not...
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24K
J
Hi everyone. I'm looking for advise on how to test IR on commercial lighting. There's so many lights on 1 circuit , do I have to take out all the...
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24K
Toneyz
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BS7671 tables only go to certain size fuses eg how can I find max ZS of 400 amp BS88 - 2 on niceic test sheets they ask for a max value out of...
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24K
Engineer54
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Hi, hopefully someone can help or put me straight on this. i have a 3 phase/415v motor which is 11kw - 15kw, 15A - 28A depending what voltage is...
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23K
Engineer54
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Hi guys does anybody please have a template risk assessment for the omission of RCD protection? Or does anyone know where I may locate one? Many...
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53
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23K
Hi all ok...i was asked to wire a motor for a fan today....3 phase motor...it had its mains lead attached pre wired. when we finished wiring the...
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K
As a follow on from Mike’s ”electricians only” thread, I’m interested to find out how many of us are industrial and maintenance electricians...
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Knobhead
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Hi has anyone recently done the am2? I just wanted a basic calculation for setting the overload (they give you motor rating in Kw) for the 3...
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C
Hi all just looking for a little advise was recently working on a ventilation control and during the works noticed that the 4kw 400v motor was...
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Morning gents, Im trying to find a wiring diagram for a three pole (three phase) contactor, using a 24v coil. Ive found plenty with a 240/415v...
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hi, i am in need of some advice on wiring for a 2 post ramp, the ramp is a Bradbury electro mechanical that was 3 phase i have replaced the motor...
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18K
gaz-c
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Hi lads/ladies After a recent post of mine, the lack of tray or trunking was highlighted on a bit of my work, i've taken this criticism fully on...
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Smudge
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Hi all Been to a micro brewery today . They have 2 water boilers with 3 phase immersion heaters in them (ie 3 x elements) Originally they were...
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32
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17K
L
I have got a little job to do tomorrow and need some assisstance. I need to install a contactor for some outside lighting. Can anyone draw me up...
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