set screw fitting on service mast riser

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Re: set screw fitting on service mast riser

Originally posted by curt swartz:
Bob, did you notice that in the link you provided the only rigid fittings available were for 1/2?, 3/4? and 1??
Click to expand...
Yeah, I was just trying to point out that they are available. A little more hunting and I could probably have found the very one (2") that is in Kenny's pictures. :)

Personally I can not imagine running 2" RMC only to terminate it with die cast junk. :roll:
 
Re: set screw fitting on service mast riser

In our area the POCO has two requirements 2-1/2" rigid galv. conduit on all services through the roof that support the load of the drop.

And if its over ten feet long the full uncut stick of conduit has to be on top the shorter piece being between the meter base and the piece going through the roof.

Here I have seen set screw connectors and coupling used not for this purpose but for EMT run on the surface outside.

I asked about this one time and the inspector said why not compression are not weatherproof. And he is right so I did not argue the point.Not from a beating rain anyway.


I have to be honest about this service and the only thing I see wrong with it is it could use another strap at the bottom end of the top conduit the piece coming down from the roof.

That is if you allow 2" as a stinger.

I think its a very neat job.


Ronald :)

[ September 12, 2004, 11:38 AM: Message edited by: ronaldrc ]
 
Re: set screw fitting on service mast riser

Curt,

This fitting is EMT/IMC/RNC listed. It is written on the fitting, I checked it. It made by Arlington I know and I think the # is 806 but I am not 100% on that part#.

Ron,

Although a decent looking job you have to consider the 109' service drop coming from across the road. This is not a strong riser. I would have accepted 3 methods. 1) Installing the joint below the first strap (although not 100% code compliant, I would have took the die cast connector turned down). 2) Installing a rigid coupling between the straps. 3) Guy the riser off. With the roof as a pivot point, all the stress is on the joint ( the thru wall bolt clamps will turn )and that connector just does'nt provide the support.

[ September 12, 2004, 04:24 PM: Message edited by: necbuff ]
 
Re: set screw fitting on service mast riser



[ September 12, 2004, 04:44 PM: Message edited by: necbuff ]
 
Re: set screw fitting on service mast riser

Hello Kenny hope you had a good day

With all due respect for you and the trade if it would have been my service and you turned it down.

I would put a rigid screw type coupling there.

But I would also give you my opinion just as I am here. I know according to code the connector is not compliant.

But as far as the structural strength you said it yourself the roof would be the pivot point.
And I think with 7.5 ft or 8 ft. of rigid pipe hanging down and strapped securely would be strong enough to hold the load of the drop pulling on it.

Since I'm not a engineer I can not state that to be a fact, just my opinion.

Thanks:Ronald :)

[ September 12, 2004, 08:31 PM: Message edited by: ronaldrc ]
 
Re: set screw fitting on service mast riser

Hello again Kenny

On this conduit I learned the hard way. I did a rewire here and had a similar situation.

The service stinger or riser was about 16 ft. long and I put the 6 ft. piece through the roof to keep from having to thread the 6 ft. piece.


When I had it inspected it passed with flying colors. But I noticed as he was pulling away from the job he noticed something.

He re-parked and told me I needed to reverse my conduit and put the full 10 ft. piece on top.

And since the short piece didn't have but about 3 ft. running down the side of the house for structural strength I couldn't disagree.

I told him if he would turn it into the POCO it would be reversed before they got there to hook it.

We have disagreements all the time but we get along. If he states the code violation I take his word for it usually if I'm wrong I'm wrong.


Sometimes I'll check the code book but not usually.


By the way I would never use a connector that way just to get out of threading a piece. But if I where to inspect one like that I would let it slide.But I'm not an inspector and maybe thats a good thing.


I noticed your from Tn. what part?

Ronald :)
 
Re: set screw fitting on service mast riser

Where do you draw the line? If it is not code compliant why would a contractor argue the point and not do it according to the code? We are not talking about saving a lot of time or money it's just a matter of taking pride in your work or trying to take short cuts and get by with what you can.
 
Re: set screw fitting on service mast riser

I agree, but we are all human and all different and we will all draw the line at a different place.

And my self I would over look it because I believe it is strong enough to hold the load and there's no way water could enter it through the connector. We will always have to use common sense now and then.

Ronald :)
 
Re: set screw fitting on service mast riser

In searching for violations of the NEC, on this installation, I came up with:
230.53
358.42
358.12(2)
300.6(A)
Ever seen EMT protected solely buy enamel rust in weather? I have, would not want it on my home.
 
Re: set screw fitting on service mast riser

By dillon3c: In searching for violations of the NEC, on this installation, I came up with:
230.53
358.42
358.12(2)
300.6(A)
Ever seen EMT protected solely buy enamel rust in weather? I have, would not want it on my home.
Click to expand...
230.53 This race-way is rain tight and would drain If rain water can get into this pipe via the connector then it can get into a rain tight weather head that 230.54 also requires to be "rain tight"

358.42 Does not apply as this is clearly RMC, IMC and Not EMT. :roll:

Now go back and look at the photo a little more

Remember A requirement for rain tight is not a requirement for it to be weather proof.

As far as strength goes It look's like it would be more than enough to hold the drop, as the clamp just above the coupling is at the fulcrum point of the pivot at the roof. but that would have to be determined at the site.
 
Re: set screw fitting on service mast riser

The 1st strap is really pushing the 3' rule from the meter base up.
Are we sure this is not emt from the meter up to the rigid conduit? Someone said this is obvious,I'm not sure.
The 109' span of overhead to the riser is not a guying requirement in our area,only the hieght of the mast above the roofline.
This is a ss fitting,someone said compression is not raintite but weatherproof,well we are outside not inside,so it should at least be weatherproof not a ss fitting which is niether.
This service mast would have failed the power co. requirements in our area even if it passed the inspector.
This was probably put in because he had no way of threading the short piece,(which around here is required to be on the bottom).
IMO it looks like a shortcut and if denied a good call by the inspector.
 
Re: set screw fitting on service mast riser

Originally posted by jap2525:
Are we sure this is not emt from the meter up to the rigid conduit? Someone said this is obvious,I'm not sure.
Click to expand...
Member necbuff was the inspector that failed this. He stated it was rigid conduit. :)
 
Re: set screw fitting on service mast riser

Wayne, if that is all Ridged Conduit on that service mast,its still not code complyant.
344.56
300.15
 
Re: set screw fitting on service mast riser

109 ft.funny we have to have another pole after 100 ft.
 
Re: set screw fitting on service mast riser

I know a lot of the poster here are from Florida. God willing maybe you'll be spared from Ivan. But someones going to catch it. :(
 
Re: set screw fitting on service mast riser

Got overrode... Knew I would. Guess it pays to complain. End of story......

[ September 16, 2004, 07:26 PM: Message edited by: necbuff ]
 
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