12" of Unsupported EMT Under Eave - Electrician Talk - Professional Electrical Contractors Forum

swimmer · 06-19-2017, 01:58 PM

I have 12" of unsupported EMT under the eave of a roof. The run along one side of the house was along the wall of the house. I then transitioned to the inside surface of the fascia board so there are 12" of unsupported conduit between the house wall and the fascia. I can't find anything in 300.18 or 358.30 that expressly prohibits this.

HackWork · 06-19-2017, 02:00 PM

Do you mean 12' (foot)?

If not, I can't figure out the question. EMT needs support every 10', so 12" is perfectly fine.

joebanana · 06-19-2017, 02:05 PM

Is it supported within 3' of the end? Is it supported at least once every 10'? Just support it right next to the unsupported part.

**Signal1** · 06-19-2017, 03:42 PM

There used to be 383.30(C) (I think) that allowed less than 36" to be unsupported. A nipple.

That was removed so technically you need some support, but if it's up and out of the way I wouldn't worry about it.

HackWork · 06-19-2017, 04:24 PM

Quote:

Originally Posted by Signal1

There used to be 383.30(C) (I think) that allowed less than 36" to be unsupported. A nipple.

That was removed so technically you need some support, but if it's up and out of the way I wouldn't worry about it.

In what situation would that be used?

**Signal1** · 06-19-2017, 06:37 PM

Quote:

Originally Posted by HackWork

In what situation would that be used?

I think in most cases a nipple between two panels or boxes.

Not really the OP situation here I guess.

He said it was a short piece under a roof eave where it's not going to get kicked around or anything. Nothing to worry about I'd say.

HackWork · 06-19-2017, 06:42 PM

Gotcha, I see what you are saying.

I'm still confused about the OP.

B-Nabs · 06-19-2017, 07:14 PM

Wow you guys can go 10' between straps for EMT? Up here it's 1.5m/5' (1/2" & 3/4"), 2m/6' 6" (1" & 1 1/4") or 3m/10' (1 1/2" and up). Same for rigid.

splatz · 06-19-2017, 07:50 PM

If I get this it's strapped right to the boards except for where the jog in the pipe crosses the soffit.
@swimmer, are you just worried about the 12" where it crosses the soffit and isn't touching a board? That's no problem at all.

swimmer · 06-20-2017, 11:25 AM

Quote:

Originally Posted by splatz

If I get this it's strapped right to the boards except for where the jog in the pipe crosses the soffit.
@swimmer, are you just worried about the 12" where it crosses the soffit and isn't touching a board? That's no problem at all.

''

@splatz Yes that's all I was worried about. Thanks

swimmer · 06-20-2017, 11:30 AM

I should have taken a picture. When I said "unsupported" I meant it isn't against any wood or stucco for those 12 inches. It just goes through the air. Anyway, I don't think I have to worry about it.

HackWork · 06-20-2017, 11:43 AM

Quote:

Originally Posted by swimmer

I should have taken a picture. When I said "unsupported" I meant it isn't against any wood or stucco for those 12 inches. It just goes through the air. Anyway, I don't think I have to worry about it.

A very large percentage of pipe runs aren't against anything, such as all the pipe run overhead being supported every 8-10 by hangers or trapezes.

06-19-2017, 01:58 PM	#1
swimmer Swimmer Join Date: Mar 2011 Location: California Posts: 654 Rewards Points: 654	12" of Unsupported EMT Under Eave I have 12" of unsupported EMT under the eave of a roof. The run along one side of the house was along the wall of the house. I then transitioned to the inside surface of the fascia board so there are 12" of unsupported conduit between the house wall and the fascia. I can't find anything in 300.18 or 358.30 that expressly prohibits this. __________________ Elvis is in the building

06-19-2017, 02:00 PM	#2
HackWork Mensa Player Join Date: Oct 2009 Location: - Posts: 34,603 Rewards Points: 383	Do you mean 12' (foot)? If not, I can't figure out the question. EMT needs support every 10', so 12" is perfectly fine. __________________ Perfection is the enemy of perfectly adequate.

06-19-2017, 06:42 PM	#7
HackWork Mensa Player Join Date: Oct 2009 Location: - Posts: 34,603 Rewards Points: 383	Gotcha, I see what you are saying. I'm still confused about the OP. __________________ Perfection is the enemy of perfectly adequate.

06-19-2017, 07:14 PM	#8
B-Nabs Watt Pusher Join Date: Jun 2014 Location: Port Coquitlam, Canada Posts: 2,240 Rewards Points: 468	Wow you guys can go 10' between straps for EMT? Up here it's 1.5m/5' (1/2" & 3/4"), 2m/6' 6" (1" & 1 1/4") or 3m/10' (1 1/2" and up). Same for rigid. __________________ Is that a real poncho or is that a Sears poncho?

06-19-2017, 07:50 PM	#9
splatz Hackenschmidt Join Date: May 2015 Location: Parts Unknown Posts: 8,840 Rewards Points: 316	If I get this it's strapped right to the boards except for where the jog in the pipe crosses the soffit. @swimmer, are you just worried about the 12" where it crosses the soffit and isn't touching a board? That's no problem at all. __________________ Everything Should Be Made as Simple as Possible, But Not Simpler

06-19-2017, 02:05 PM	#3
joebanana Senior Member Join Date: Dec 2010 Location: So.Cal. Posts: 3,703 Rewards Points: 7,349	Is it supported within 3' of the end? Is it supported at least once every 10'? Just support it right next to the unsupported part.

06-19-2017, 03:42 PM	#4
Signal1 Gold Pliers Champion Join Date: Feb 2016 Location: Boston Area Posts: 2,350 Rewards Points: 2,270	There used to be 383.30(C) (I think) that allowed less than 36" to be unsupported. A nipple. That was removed so technically you need some support, but if it's up and out of the way I wouldn't worry about it.

06-20-2017, 11:30 AM	#11
swimmer Swimmer Join Date: Mar 2011 Location: California Posts: 654 Rewards Points: 654	I should have taken a picture. When I said "unsupported" I meant it isn't against any wood or stucco for those 12 inches. It just goes through the air. Anyway, I don't think I have to worry about it. __________________ Elvis is in the building

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