Persons experienced in steel conduit

[TJC1]

Good afternoon one and all

Does anyone in the Dorset area have good experience with steel conduit? If so please could
I pick your brains on a few things?

 

[westward10]

What is it you want to know.

 

[TJC1]

What is it you want to know.

I have a car park coming up and haven’t really had much involved with steel conduit before. I just wanted to find out timing on installs?

It’s all straight runs

 

[Andy78]

I've got a book, albeit rather aged, on time norms for pricing if you'd like me to dig that out ?
[automerge]1582646250[/automerge]
It's a very laborious way of working things out, but this might give you a rough idea of where you need to be. Try roughing it out with this method after first having an estimate at times and see how they tally up.

Not much has changed in the installation of steel conduit since the publishing date of 1978 so it should still be relevant.

 

[Vortigern]

Dependant on complexity it takes 50-75% more time than plastic conduit in my experience. So whereas it make take me two days to put in a plastic conduit around 20m x 10m warehouse including pillars and connection complete with testing it could take 3 to 4 days in galv.

 

[davesparks]

I have a car park coming up and haven’t really had much involved with steel conduit before. I just wanted to find out timing on installs?

It’s all straight runs

It can't all be straight runs otherwise all the lights will be in a single row in front of the DB!

 

[KennyKen]

Conduit Graveyards ???

Allow extra time in your price mate. Or sub the car park, put it to someone more suited for it.
I used to love doing Car parks best bit about doing the residential tripe.

 

[Dustydazzler]

In my experience price for if you were using plastic pipe and then double the quote...

 

[Megawatt]

I've got a book, albeit rather aged, on time norms for pricing if you'd like me to dig that out ?
[automerge]1582646250[/automerge]
It's a very laborious way of working things out, but this might give you a rough idea of where you need to be. Try roughing it out with this method after first having an estimate at times and see how they tally up.

Not much has changed in the installation of steel conduit since the publishing date of 1978 so it should still be relevant.View attachment 55977View attachment 55978View attachment 55979

I’m impressed Andy when I was working in the office we used something very similar to quote jobs but that being from 1978 the labor is still basically the same. You don’t throw nothing away. Congratulations

 

[Andy78]

I’m impressed Andy when I was working in the office we used something very similar to quote jobs but that being from 1978 the labor is still basically the same. You don’t throw nothing away. Congratulations

It's actually my dad's old book that he taught me to price larger jobs from. Doesn't get much practical use these days but it's still being kept.

 

[Lister1987]

Snip

What's thr book called Andy? Got an ISBN number for it, it's got me intrigued

 

[ipf]

In my experience price for if you were using plastic pipe and then double the quote...

I price for steel conduit …..suppose I should half it if I use pvc?
Must admit, I just price for either, dependant on situation and requirements. In most instances, although pvc's a doddle and cheap stuff, allow for more fixings.

 

[Megawatt]

I price for steel conduit …..suppose I should half it if I use pvc?
Must admit, I just price for either, dependant on situation and requirements. In most instances, although pvc's a doddle and cheap stuff, allow for more fixings.

PVC Is fine if you’re concerned about it just use schedule 80 PVC conduit. Also consider EMT or IMC conduit there both cheaper than ridged conduit. Good luck

 

[mattg4321]

PVC Is fine if you’re concerned about it just use schedule 80 PVC conduit. Also consider EMT or IMC conduit there both cheaper than ridged conduit. Good luck

That won’t be relevant in the U.K. and I have no idea what you’re on about. A quick explanation would be interesting though.

In the U.K. we usually only really use heavy gauge pvc conduit which isn’t flexible/ridged unless otherwise stated.

I’ve not seen light gauge in years

 

[davesparks]

That won’t be relevant in the U.K. and I have no idea what you’re on about. A quick explanation would be interesting though.

In the U.K. we usually only really use heavy gauge pvc conduit which isn’t flexible/ridged unless otherwise stated.

I’ve not seen light gauge in years

When the Americans say ridged they mean rigid, and it refers to what we would call screwed steel conduit.

 

[Dustydazzler]

EMT is what the yanks use I think ?

Its much thinner than our galv conduit

 

[davesparks]

EMT is what the yanks use I think ?

Its much thinner than our galv conduit

They have different grades of metal conduit, much like we used to (we still do but most wholesalers don't stock light gauge steel these days)
EMT is the lighter gauge stuff and rigid(ridged as they spell it) steel is the heavier gauge as far as I know.

 

[Dustydazzler]

They have different grades of metal conduit, much like we used to (we still do but most wholesalers don't stock light gauge steel these days)
EMT is the lighter gauge stuff and rigid(ridged as they spell it) steel is the heavier gauge as far as I know.

I have seen guys on youtube bend their EMT stuff over their knee so it mus be pretty thin skinned.
I don't think they use much pvc conduit so EMT is their equivalent I suspect...

 

[Megawatt]

EMT is what the yanks use I think ?

Its much thinner than our galv conduit

Yes Dusty we use EMT, IMC, PVC Schedule 40 and 80, and rigid conduit and seal tite and Carlon flex

 

[davesparks]

I have seen guys on youtube bend their EMT stuff over their knee so it mus be pretty thin skinned.
I don't think they use much pvc conduit so EMT is their equivalent I suspect...

They use plastic conduit in two grades, effectively light and heavy duty
and steel conduit in 3 grades EMC (light duty) IMC (intermediate duty) and RMC (heavy duty)
plus various flexible conduits.

As far as I know they don't use a lot of trunking (Raceway in US language i think)

 

[Dustydazzler]

Yes Dusty we use EMT, IMC, PVC Schedule 40 and 80, and rigid conduit and seal tite and Carlon flex

I also see a lot of older houses on youtube wired fully in MC cable

Do you still use a lot of MC or is it out of fashion now ?

 

[Megawatt]

I also see a lot of older houses on youtube wired fully in MC cable

Do you still use a lot of MC or is it out of fashion now ?

I’ve never seen someone use MC cable in Homes we use NMS or romex which is the same thing. MC cable is always used in commercial applications. Industrial is always either cable tray or IMC conduit

 

[Dustydazzler]

I’ve never seen someone use MC cable in Homes we use NMS or romex which is the same thing. MC cable is always used in commercial applications. Industrial is always either cable tray or IMC conduit

Old house wired with MC/bx

View: https://www.youtube.com/watch?v=5NNqb59VJ6g

 

[Megawatt]

Old house wired with MC/bx

View: https://www.youtube.com/watch?v=5NNqb59VJ6g

I personally wouldn’t ever use MC cable in Domestic it’s a lot more expensive than Romex and to me it’s a pain in the but and you would have to use metal boxes. I use plastic boxes and reason is you don’t have to bond plastic

 

[Dustydazzler]

I personally wouldn’t ever use MC cable in Domestic it’s a lot more expensive than Romex and to me it’s a pain in the but and you would have to use metal boxes. I use plastic boxes and reason is you don’t have to bond plastic

It looks to me that a lot of the older houses from the 1950s and 1960s were wired using MC ?

 

[Megawatt]

It looks to me that a lot of the older houses from the 1950s and 1960s were wired using MC ?

It probably was but what I run into on a lot of old homes is knob and tube wiring which if you do any work on them homes code enforcement demands you bring it up to today’s standards
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It probably was but what I run into on a lot of old homes is knob and tube wiring which if you do any work on them homes code enforcement demands you bring it up to today’s standards

I try and stay away from those knob and tube homes because it’s a lot of work for a total rewire. Too old for that work, I sub that out to others for a fee