plastic conduit bends?

[PEM]

Guys, as guidelines state that inner radius of a conduit bend should be a minimum of 2.5 X the diameter of the conduit diameter what on earth can you use the "right angled" plastic conduit bends that are sold??

 

[VoltzElectrical]

Never see them used. Inspection elbows, yes, but never installed them. Only used through boxes TBH.

Plastic conduit is so easy, i can't believe this question came up...

Don't let it keep you up tonight love!

 

[snowhead]

Is the O.P saying the preformed bends are less than 50mm bend radius for 20mm?

 

[onions1066]

Inspection elbows look rubbish anyway so don't use them is the easiest answer to your question

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Is the O.P saying the preformed bends are less than 50mm bend radius for 20mm?

Yes I think so in a round about way

 

[Robotstar5]

I find my knee gives a good radius

 

[PEM]

My point being the 90 degree inspection bend appears contrary to the 2.5 x radius guideline.

As for love sorry its far too soon for me !

 

[VoltzElectrical]

whilst i appreciate a discerning mind, I feel for you my love that you need... to get a life.

 

[onions1066]

I'm sure if it was a major problem it would of reared its ugly head before now and the company that manufacture them would of thought twice about making them, just roll with it and worry about something else.

 

[PEM]

Niciec picked up on it in a recent inspection.

 

[onions1066]

Niciec picked up on it in a recent inspection.

Im sure they probably didn't, if they did give them the number for the conduit manufacturers

 

[snowhead]

My point being the 90 degree inspection bend appears contrary to the 2.5 x radius guideline.

As for love sorry its far too soon for me !

Clue here;

 

[DPG]

Yes, but it's a curve - not a 90 degree right angle 'corner'. You could describe the bigger 'inspection elbows' as 90 degrees by your reasoning. (the OP I mean). Daz

 

[snowhead]

I was using inspection bends, or elbows as we knew them, 45 years ago and as far as I know the radius of manufactured bends hasn't changed over all that time.
Someone would have noticed if they didn't conform.

And conduit has changed from Imperial to Metric as well in that time.

 

[DPG]

What I mean is that it's the inner radius that's the important figure. What's the inner bend radius of your 20mm right angle conduit bend. Daz

 

[PEM]

Niciec picked me up on it on a recent inspection . Wasn't a big issue but under BS 7671 he quoted 522.8.3. And the on site guide table D3 note 3. Been using the stuff for years never an issue but under this note which states "the radius of a conduit bend should not be less than 2.5 times the outside diameter of the conduit". On the 20mm I was using this is 50mm inner radius which the right angled bends sold clearly are not. Maybe I should get a life!! Regards