Which conduit ?

[Guest569]

Im pricing some external lighting on several industrial units which are all joined. One long length of conduit will suit although its around 150-200yards long. Nice straightforward run with no bends. Its around 8m high and away from any mechanical damage, my only concern is sun damage over time.

Galvanised conduit would be best but a) its going to add a considerable cost to job and b) its going to take much longer to install.

is white PVC ok , should I install black PVC, or should I risk losing the job pricing for galvy ?

The customer will likely want cheapest.

 

[Megavolt]

White HIP for me. Black does look better but I have had it fading badly after a couple of years.

Or SWA

 

[MDJ]

I would use armoured cable on the inside of the units myself, surface conduit will not be the best method for this project. However if you are determined to do it then I would use galv conduit myself, Armoured along the inside is the best method though hands down IMO

 

[Megavolt]

Are these units all one company or are they separate business's

 

[Guest569]

problem we have is we are not to disturb residents of units. We have an external supply so no reason at all to enter. I like the idea of conduit because it would be easy to add more lights later, Im pretty certain he will do this.

 

[MDJ]

Well I have lost count of the Business units I have wired up and never run conduit 150-200 mtrs around the front that's for sure, still you asked for views, I gave mine.

 

[Guest569]

Are these units all one company or are they separate business's

Separate , we have a landlords supply for a large pump so will be using that meter to supply small 2 way board , contactors and dusk till dawn sensors. The front of the building is around 200yards long but its an nice easy straight run

 

[Guest569]

Well I have lost count of the Business units I have wired up and never run conduit 150-200 mtrs around the front that's for sure, still you asked for views, I gave mine.

Of course , not my usual field so advice welcome.

its actually the back of the units and not particularly pleasing on the eye so for aesthetics I'm not too concerned.

I am coming round to the idea of armour now Ive thought about it .

 

[Guest111]

Another problem with pvc conduit can be expansion,seen quite a few long runs where they have sagged during the summer,ends up looking a right mess.

 

[Megavolt]

Allways price both options. Gives you two bites of the apples then.

Proberly lose job to some tw&t that does it in surface twin anyway :devil2:

 

[MDJ]

Well if you have to use tube you will be better off using galv, plastic will move about all over the place over a period of 2-3 winter/summers and look awful eventually.

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Another problem with pvc conduit can be expansion,seen quite a few long runs where they have sagged during the summer,ends up looking a right mess.

beat me too it phil lol

 

[Guest111]

Well if you have to use tube you will be better off using galv, plastic will move about all over the place over a period of 2-3 winter/summers and look awful eventually.

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beat me too it phil lol

That's 'cause I wasn't stood in the corner with a party seven lol

 

[Risteard]

Well if you have to use tube you will be better off using galv, plastic will move about all over the place over a period of 2-3 winter/summers and look awful eventually.

Prefer steel myself, but with expansion couplers the PVC shouldn't look quite so crap!

 

[Plonker 3]

200 yards of cable down conduit, you will have considerable volt drop on that. Having you done your calcs to work out if you will get the cables down a conduit?

 

[londonlec]

Steel conduit for me. PVC will sag and look horrendous.

 

[SPARTYKUS]

Not sure if it applies to conduit but black flex is preferred outside due to its superior UV qualities. Which I always struggled with because I was taught that black absorbs heat and white reflects so could never get why black flex was better outside until I looked it up. And its deeper than that.

so wondered if it applies to conduit too.

Maybe thats why SWA is black

 

[Plonker 3]

Steel conduit for me. PVC will sag and look horrendous.

not if the saddles are correctly spaced it won't.

 

[telectrix]

SWA all the way , IMO< wirh ad. boxes at eacht fitting on flex

 

[Guest55]

really long runs of pvc conny end up looking cack over time..........

galv will triple the cost............

swa or fp200 for the win !

 

[Aindowsimon]

Galv conduit all day long and did do a very similar job last year looked well, remember a tin of galv spray for vice markings on tube and I spray saddles as well if external seen them rust prematurely

 

[Aindowsimon]

Galv will be easier to dress along 200yards than swa

 

[ChrisElectrical88]

SWA into galv t boxes with a stuffing gland at each fitting for me please? Volt drop will need to be considered as mr B stated.

 

[ChrisElectrical88]

MICC would be best...

 

[Guest569]

5x 80w LEDs , so minimal load.. thinking 1.5mm should be ok but will likely run 2.5 to be safe. Not even sure contactor will be required , may split load into 2 DTD or perhaps even one will do need to check switching load been while since fitted one ?

 

[MDJ]

1.5? 200 mtrs? hmm

 

[Guest569]

starting to think armour would be pretty quick , 2 men cherry picker , chalk line , hold , clip hold, hold , clip ....gland...box light , hold clip hold clip...

At my pace Ill rattle 200 yards in a day ;P

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1.5? 200 mtrs? hmm

200 yards , around 180m , but like I said will likely do 2.5 anyway

 

[7029 dave]

Me likes galvo, plastic if you have to, swa possible, micc love it,fp never worked with it.

 

[MDJ]

At my pace Ill rattle 200 yards in a day ;P

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Aye that's true lol

 

[ChrisElectrical88]

How many lights and what wattage?

 

[MDJ]

How many lights and what wattage?

5 80 watt leds

 

[Plonker 3]

starting to think armour would be pretty quick , 2 men cherry picker , chalk line , hold , clip hold, hold , clip ....gland...box light , hold clip hold clip...

At my pace Ill rattle 200 yards in a day

Or be in the pub by lunch, and use a laser level

 

[Guest569]

quoting around 4k including VAT,

Require x5 80w LEDs, few drums or armour or conduit plus singles, accessories etc.

Cherry picker for 1 week , all very basic runs and routes ....

what you think ?

 

[High Tower]

FP is useless as far to soft!, galv would be my choice, if it's a straight run then it's about 65 lengths, with a thro box every 9m, you can get away with saddling galv on a horizontal plain every 800, where as SWA will need clipping every 300 on the horizontal, two of us could put that lot up and have it wired in 3 days.

SWA is your other alternative but be warned, 6x2.5 and 3x 1.5 conductors in a t box will be bordering on a bit tight.

 

[Guest569]

Or be in the pub by lunch, and use a laser level

next on my toy list

 

[Plonker 3]

Would probably pay for itself on this job alone if your price is correct.

 

[KAS1]

2 x Tubes of "No more nails" and Bob's your uncle, in the pub by 11am

 

[MDJ]

quoting around 4k including VAT,

Require x5 80w LEDs, few drums or armour or conduit plus singles, accessories etc.

Cherry picker for 1 week , all very basic runs and routes ....

what you think ?

Well without actually costing the materials myself I cannot confirm the price either way, however first impression it seems a good quote actually, works out about 3,250 ish plus vat.

 

[telectrix]

3" galv tray on stand-offs then cable tie SWA. future proofing for any new cable runs.:drool5:

 

[telectrix]

Well without actually costing the materials myself I cannot confirm the price either way, however first impression it seems a good quote actually, works out about 3,250 ish plus vat.

sounds like you've recovered from your sourcreamflow binge.

 

[MDJ]

sounds like you've recovered from your sourcreamflow binge.

Only just, never again lol