RMC service mast

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Any mast over 30" above the roof, we would use two guy wires from mast to eye bolts

in the roof. 220/221 I seem to remember using 3/4 EMT with the ends flattened out to support

the mast.
 
Go up there with a guywire kit, and a tube of cold weather roof tar +gun. Its up to you. Seems dangerous right now though. Guy wire yourself up there so you don't fall.
 
I have a job coming up where I will go with a 5' piece of emt right above the meter panel and then transition to a full 10' stick of ridgid so the coupling is not near the roof.
Is that how you guys do the job or do you use all ridgid and thread the short piece?
 
sd4524 said:
I have a job coming up where I will go with a 5' piece of emt right above the meter panel and then transition to a full 10' stick of ridgid so the coupling is not near the roof.
Is that how you guys do the job or do you use all ridgid and thread the short piece?
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Maybe it's just me but I would never transition to 5' of EMT as you've described. Some inspectors may also have a problem with an EMT connector screwed into the rigid coupling. I would just run the RMC into the meter enclosure and be done with it. I realize that this may take more time if you need to cut and thread a 5' piece of RMC.

Regarding the photo in the OP, I would put a red sticker on that job. :roll:
 
sd4524 said:
I have a job coming up where I will go with a 5' piece of emt right above the meter panel and then transition to a full 10' stick of ridgid so the coupling is not near the roof.
Is that how you guys do the job or do you use all ridgid and thread the short piece?
Click to expand...

NO! Use RMC the entire length, also, just buy a thread less connector if you don't own a pipe threader.
 
sd4524 said:
I have a job coming up where I will go with a 5' piece of emt right above the meter panel and then transition to a full 10' stick of ridgid so the coupling is not near the roof.
Is that how you guys do the job or do you use all ridgid and thread the short piece?
Click to expand...

I would by two sticks of rigid and put the cut end at the bottom with a threadless raintight connector.
 
renosteinke said:
An EMT fitting nas straight threads, and will not properly seat in the panel hub.
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infinity said:
Neither would an SE connector but there are millions of those installations too. Good point.
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Unfortunately the same problem exists with my threadless RMC connector but they are so big around they overhang the hub by quite a bit so the water sheds off the sides. :)

But I do think it is a technical violation. :(
 
stickboy1375 said:
Which actual code violation are we looking at with the threads being an issue?
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I would cite 230.28. Threading RMC removes about 50% of the metal at the thread. This would significantly reduce the strength of the conduit being used as a mast. Without the coupling the worst case scenario if the drop were some how stressed is that the conduit might bend. With the coupling and threads it might break off completely.

230.28 Service Masts as Supports.
Where a service mast is used for the support of service-drop conductors, it shall be of adequate strength or be supported by braces or guys to withstand safely the strain imposed by the service drop. Where raceway-type service masts are used, all raceway fittings shall be identified for use with service masts. Only power service-drop conductors shall be permitted to be attached to a service mast.
Click to expand...
 
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