When conecting PVC electrical conduit does it have to be glued into fittings ie elbows , sockets etc or can it just be left as a push fit , And if glued what is best to use the same as solvent weld for plumbing or what Thanks
How to conect pvc conduit
- Thread starter Thingybob
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sawtooth-9
Established Member
Internally, you can do just a press fit - but not good practice.
Externally, you really really should use solvent cement. It is a clear liquid and available from where you buy the conduit.
It "sets" quickly and "lubricates" the fit.
But most importantly, it helps keep any moisture from inside the conduit and stabilisers the installation.
Argus
Established Member
Exactly.
I had an old-fashioned electrical apprenticeship when the Electricity Boards of the day used the 14th edition of the IEE Regs......... the Beatles were just starting recording about then...
Electrical conduit was not air-tight and outdoor pipework could attract internal condensation over time. It was an acceptance, when using metal conduit externally (PVC was unheard of then), to drill a discrete, tiny (1/8th inch), hole at the backs of the lowest sections to allow any condensation to escape.
Sounds odd, but internal water build-up over years was not unheard-of.
I had an old-fashioned electrical apprenticeship when the Electricity Boards of the day used the 14th edition of the IEE Regs......... the Beatles were just starting recording about then...
Electrical conduit was not air-tight and outdoor pipework could attract internal condensation over time. It was an acceptance, when using metal conduit externally (PVC was unheard of then), to drill a discrete, tiny (1/8th inch), hole at the backs of the lowest sections to allow any condensation to escape.
Sounds odd, but internal water build-up over years was not unheard-of.
Good old solvent cement, same for plumbing and what we used to glue our airfix models together with in our youth.
Yes same here, no plastic conduit just bundles of steel conduit that would often need bending and then threading by hand with tallow and was a task given to apprentices along with a not too sharp hacksaw blade to make them work harder. The plastic conduit does not suffer with condensation like the metal stuff and as said it is best practice to glue it together but just a dab because it is not a waste pipe carrying liquid. It is important to clamp it down and will need clamping at closer intervals than metal.
Yes same here, no plastic conduit just bundles of steel conduit that would often need bending and then threading by hand with tallow and was a task given to apprentices along with a not too sharp hacksaw blade to make them work harder. The plastic conduit does not suffer with condensation like the metal stuff and as said it is best practice to glue it together but just a dab because it is not a waste pipe carrying liquid. It is important to clamp it down and will need clamping at closer intervals than metal.
Johnwa
Established Member
If you're doing a long straight run of plastic conduit (every couple of lengths) we used to add an expansion connector. Plastic tube does expand and contract quite a lot with temperature which does cause sagging and pulling apart on unglued joints.
