Discuss Looks a squeeze, 240 swa thoughts. in the Electricians' Talk area at ElectriciansForums.net
Where did the 240mm2 SWA calcs come from? that's a big old cable. Ignore please I got my sums wrongCannot get them in Pete, ATEX. Have 2 M75 holes so cannot mod the box.
Yes without eyes on, it was a daft question,Amtech.
FLC is around 420 IIRC. 30+ run on a ladder in a hot factory.
Not sure a motor that size would be started DOLAm I right in thinking with VFDs that it would be a three core cable, with the motor connected in star formation?
Edit:- I'm thinking it may be dependent on the driver itself.
Am I right in thinking with VFDs that it would be a three core cable, with the motor connected in star formation?
Edit:- I'm thinking it may be dependent on the driver itself.
ThanksYes, a VFD cable should be symmetrically arranged, no 4th core.
1 cable, 3 cores to this motor.
Not sure a motor that size would be started DOL
Sorry Mate never had any dealings with ATEX why the restrictions on mods?Angled lugs! Never seen them, I'll have a google and give the info to the sub-contractor.
Pete, its a ATEX motor. No mods whatsoever unfortunately.
Thanks Lee you learn something new every day, I understand the restrictions now, thanks again for the reply.Certified kit pal, it has to be how it was designed to function in hazardous areas.
To be fair this is outside the zone now, but if that changes back I don't my name on a bodged up 10 plus grand motor.
Something doesn't ring right about this thread, firstly we need to know how the motor is going to be started and connected, can we get a pic of the plate here and then go on from there, if we have a star/delta arrangement then the csa of cores can be reduced, from experience they do not make motor connections that are impossible to connect to whether it be space or terminal arrangement, if this seems the case then we have missed something out here.
PS - where did 240mm cable come from?, first mentioned in post 6?
Too small once you apply grouping factors.Of the top of my head I cannot see you needing anything larger than 70mm paralleled up using single core tri-rated, assuming distance not an issue here from VFD to motor?
Too small once you apply grouping factors.
Ccc for tri rated are generally for a single conductor in free space, apply six of them and assuming they will not be separated in free space grouping factors should be applied.Expand on your grouping factor, why would you be applying it here?
Ccc for tri rated are generally for a single conductor in free space, apply six of them and assuming they will not be separated in free space grouping factors should be applied.
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