Discuss unistrut lighting system in the Electrical Forum area at ElectriciansForums.net

rockrose

Active EF Member
Messages
27
Location
ireland
Hi in a factory with old t8 light fittings fitted and wired on a unistrut system.The job is to replace them with led fittings i suggested removing the unistrut replacing it with 50/50 galv trunking the factory boss wants to leave the unistrut to save time and money and rewire and fit new fittings to the existing unistrut any thoughts
 

telectrix

Scouser and Proud.
Respected Member
Messages
60,336
Location
cheshire/staffordshire
boss is the boss. he wants lights mounting on fairy dust, you mount them on fairy dust.
 

spinlondon

Forum Mentor
Messages
11,085
Location
Harlow Essex
I once got tasked with hanging flouries in a row using gripple wire.
Would not have been possible to space them how they wanted as there were things in the way.
Persuaded them to allow me to use 50mm X 50mm trunking in two rows with braces across for the fittings.
All wiring hidden away, used rods to hang the trunking.
 
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rockrose

Active EF Member
Messages
27
Location
ireland
not just as bad as that pvc only red and black, connectors,tape wires run over ballasts,over heating mounds of dust on top of unistrut. is there any regs not allowing unistrut to be used as a wiring system
 

KEV 1 N

Electrician's Arms
Messages
799
Location
Durham
You can get a plastic lid that clips over the unistrut channel....if that’s any help?
E8B09A2A-ED69-4107-B919-C660E17CB56D.jpeg
 
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rockrose

Active EF Member
Messages
27
Location
ireland
sorry no photos yet there is a metal lid that covers the unistrut ,may require steel conduit drops later for power and switching that is the reason to replace with trunking for more space and connecting conduit
 

ipf

Forum Mentor
Messages
4,859
Location
Walmington-on-Sea/Lancashire
I use plenty of Unistrut but must admit I've never used it as cable trunking...… for fixing the trunking to, yep.
The thing is, with Unistrut you'll get a much better span than 2x2 or lighting trunking, which you'll have to fix more regularly.
Could you not use the existing stuff to fix trunking to with spring nuts and bolts?
 
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rockrose

Active EF Member
Messages
27
Location
ireland
yea thats what i want to do but the factory boss wants use the unistrut to save money on trunking and time
 

essex

Forum Mentor
Messages
1,622
Location
Wiltshire
Tell him it isn't cable trunking and, as such, not suitable to carry the cables. I've never seen that lid on 'strut' before but Unistrut do trunking too.....different altogether.
Unistrut can have a cover to the channel fitted. Not sure I would call it a lid.

Unistrut is perfectly fine to carry cables that do not need mechanical protection of steel trunking.
 

Marvo

Admin and gender confused
Staff member
Admin
Messages
15,419
Location
South Africa
You can get a plastic lid that clips over the unistrut channel....if that’s any help?
View attachment 44258
You also get steel lid for unistrut.....and stainless steel 'dairy grade' lids as well.
I also regularly use it as containment for both cables and singles wiring, not sure why there'd be any advantages to using truking over unistrut or why unistrut wouldn't fit the bill admirably as containment.
 

Andy78

Respected Member
Messages
8,395
Location
Kingston upon Hull
I have used unistrut for containment before, but not fully. Usually as a stanchion where a cable drops off a tray, and only with sheathed cables. Don't think I'd use it with singles like a proper trunking.
 

Marvo

Admin and gender confused
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South Africa
If I use it as structural support ie bolted to a wall with cantilever brackets and spring nuts then no, I wouldn't use it as containment in those circumstances.

Suspended from a factory roof with fluorescents fixed to the underside....yep, containment.

Call me a cowboy images.jpg I don't care :cool:
 
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ipf

Forum Mentor
Messages
4,859
Location
Walmington-on-Sea/Lancashire
Maybe wrong, but I would doubt it's bs standard rating for carrying single insulated cables. Much stronger than trunking, yes, but what about bushing, locknuts, bends, etc? It's not made for it.
 

essex

Forum Mentor
Messages
1,622
Location
Wiltshire
Maybe wrong, but I would doubt it's bs standard rating for carrying single insulated cables. Much stronger than trunking, yes, but what about bushing, locknuts, bends, etc? It's not made for it.
I would not wire singles in it.
 
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Marvo

Admin and gender confused
Staff member
Admin
Messages
15,419
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South Africa
There's nothing in our local regs preventing it being containment if it's installed accordingly but the UK regs may well not allow it.

There's no pre-formed bends as such, corners and tees are made by hand using a variety of winged brackets bolted on the backside of the strut.
 

essex

Forum Mentor
Messages
1,622
Location
Wiltshire
That's my whole point, Neil. I presumed the wiring indicated was just that.
Before I done some research I would have insisted in rewiring in FP200 or similar.

However I have just checked an unistrut does conform to BS 61537 that is the Standard for wiring systems so it would appear that unistrut is suitable so long as it is installed to manufacturers specifications.

Every day is a school day.
 

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