Old slip tube

[7029 dave]

Any body like to guess, how old this method of conduit pre thread, slip tube, I would say late 1800's, but I am sure it was not till well after the 1900's. Any one like to put an date to it.?

 

[CockneyReject]

Must admit, I can't remember seeing any db's made of wood on an old factory wall.

Neither have I but then again who said anything about just factories, any slip conduit I've come across has either been on farms or 1930/40's houses with pretty much all of the original install still intact and the wooden ones were in a number of farm houses round here

 

[DPG]

Lovely sound when that engine starts and gets up to speed Lucien. Daz

 

[Engineer54]

The only slip conduit i know of that was used in the UK, had captive clamps on couplings and conduit fittings, and i can't see any in the OP's photo?? Still used in part i believe on some security alarm installations (shop doors etc)....

 

[Lucien Nunes]

Yes that's about the only place you see it used now, just to provide some vandal resistance to multicore ELV cables. But now we have pin-grip back again, using regular metric tube, donkey's years after it went out with lug-grip for being too flimsy at the joints. OK for looks but not my choice. I often wonder how conduit would have evolved if there hadn't been a precedent of threaded gas piping to guide electricians' thinking. Perhaps a better slip / clamp system would have been developed from the beginning.

Daz there's nothing quite like standing between two of these on the back of an old Scammell ballast tractor, hot and oily after running all day, lighting set throbbing to the beat of 50's R'n'R as the lighting chaser swings the ammeter back and forth... then the klaxon sounds and the fuel rack on the power set opens right up as everyone floors the pedal in the dodgems. Magic!
BTW don't do this when at the fairground with your other half. I did, and it was difficult to convince her to share a waltzer car with with someone covered in soot who smells of diesel. I have since learned that most girls don't go to the fair to fix injection pumps with their mates.

[/memory lane]

 

[davesparks]

Pin grip? Is that the ridiculous stuff you put together with a teeny tiny grub screw?

If it is a local entertainment venue has been wired in that stuff, it's only been open a couple of years and it's all falling apart (along with the rest of the venue). I think the name 'G-live' will strike fear into anyone in the industry.

 

[Engineer54]

Never seen grub screw connections on UK conduit systems slip or otherwise, but that is the system they use in the States and Canada, called EMT Electrical Metallic Tube.... They think it's the Bee's Knees, but in truth it's god awful stuff. Their Real screwed conduit is called ''Rigid Conduit'' probably because the EMT is anything but rigid!! lol!!