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#33609 - 01/26/04 02:27 PM Bend radius for SEU  
Happi_Man  Offline
Joined: Jun 2002
Posts: 206
Columbus, Ohio - USA
Anyone know how to calculate the bend radius of your service cable?

I've got an inspector who keeps failing my job even though he hasn't once taken out a tape measure. Funny...In addition to the wrong bend radius of the SEU inside and outside, the hot AND cold water not being bonded within 5' of the entrance (which is on the other side of the finished basement), and the fact that he couldn't look in the panel because HE didn't have a screw driver, he tells me I haven't met my 18" minimum over the roof coming out of the weatherhead. He told me that without a ladder or tape measure...I sent two guys to fix it and they got the conductors up to about 20". I rescheduled the inspection today and he didn't even go inside because he says we didn't fix the things he asked for outside (of course again, he didn't climb a ladder or pull out a tape measure to actually check). Apparently this guy has some sort of bionic tape measure built into his eyes...

What do you do about these kind of guys??? "Oh I didn't come prepared to perform and inspection so you fail" What the?

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#33610 - 01/26/04 03:00 PM Re: Bend radius for SEU  
rowdyrudy  Offline
Joined: Nov 2002
Posts: 169
Mascoutah, IL USA
Get your video camera and document the items. Video the inspector when he shows. Then nail his a__ in court. It's been done several times in varied jurisdictions.

#33611 - 01/26/04 03:20 PM Re: Bend radius for SEU  
Redsy  Offline
Joined: Mar 2001
Posts: 2,056
Bucks County PA
Is he a government(township, state, county) inspector, or from an independent agency? If independent, and you don't feel that he is being fair, call another inspector or agency.

As far as calculating the radius of the bend...

Picture a ball placed against the inner side of your bent cable. Depending how tight the bend is, a larger or smaller ball would fit snugly inside. If an 8" diameter ball would fit inside, the radius is 4". If a 6" ball would fit inside, the radius is 3", etc.
Assuming the thickness of the SE Cable is 3/4", the minimum radius(per 338.24) would be 5 x 3/4 = 3.75".

[This message has been edited by Redsy (edited 01-26-2004).]

#33612 - 01/26/04 05:28 PM Re: Bend radius for SEU  
Happi_Man  Offline
Joined: Jun 2002
Posts: 206
Columbus, Ohio - USA
Beautiful explanation. Thank you...

Let me ask you this...what would teh diameter of 4/0 SEU be? I mean - its an oval is it a 1 3/4" Diameter or a 3/4" diameter. Should I be measuring the thickness of the conductors or the thickness of the entire insulated cable?

BTW - here is the latest. We asked him if he actually got up there and measured the height of our conductors out of the weatherhead. His reply, "No, because you didn't supply a ladder..." Are you serious? Is it really my responsibility to supply the inspector with the tools he needs to do his job?

He also made a point to tell me that he left a reinspection fee tell me why he really won't pass it...

[This message has been edited by Happi_Man (edited 01-26-2004).]

#33613 - 01/27/04 12:07 AM Re: Bend radius for SEU  
nesparky  Offline
Joined: Jun 2001
Posts: 642
I would be talking to this inspectors boss now. If the inspector does not have the tools to do his job, then he or his boss should supply them. I would not ask him to bring a ladder if I had one there, but I would not make a special trip to get one either.
I would take a tape measure, ladder and camera to get a picture of the 20" clearance and show it to the inspectors boss.
I would also hold a ball in the curve of the SER cable to show an appropate radius with the tape measure showing the balls diameter.
Pictures are worth a lot when it comes to these inspector's messes.
Just make sure all previously identified complaints are truely fixed then take the pictures and a trip to see the inspectors boss. Be truthful on what needed to be fixed and what did not and when.
You do need to diplomatic but not run over by an inspector not doing his job.


#33614 - 01/27/04 08:53 AM Re: Bend radius for SEU  
Redsy  Offline
Joined: Mar 2001
Posts: 2,056
Bucks County PA

I wonder about that myself. After all, the wide dimension is actually the combined diameter of 2 conductors.
Just to be safe though, if the cable is bent on the flat (which it probably is), I would use 3/4". If it is bent on edge, I would use 1 3/4". I'm not sure you could even bend it on edge that tightly.

#33615 - 01/27/04 12:14 PM Re: Bend radius for SEU  
Jim M  Offline
Joined: Aug 2001
Posts: 457
Chestertown, MD, USA
Several things seem a little strange, 1) Where is the requirement for the hot/cold bonding within the first 5'? 2) Is the 18" measurement the exposed conductors out of the weatherhead? My POCO wants 3', but the connection crews sometime cut them down to 1'. If this is your case why would you need to measure. I would think that as long as you were close to the 18" it would be no big deal. I certainly wouldn't climb up there just to measure.

#33616 - 01/27/04 07:03 PM Re: Bend radius for SEU  
hbiss  Offline
Joined: Dec 2003
Posts: 886
Hawthorne, NY USA
18" to the bottom of the drip loop?

I would like to know how you are supposed to bond the hot water within 5 feet of the entrance when it doesn't enter the building... or does it? Is this like a co-op complex where the hot water is distributed under ground between buildings?

#33617 - 01/27/04 08:49 PM Re: Bend radius for SEU  
Electric Eagle  Offline
Joined: Apr 2002
Posts: 914
Alpharetta, GA
After the first fail, I would've called the inspector if I wasn't excactly sure what he wanted. If I thought he was going to be problematic I would've met him on the job to go over the re-inspect. Now you're both pissed off and he's going to be a jerk. I'd try to correct the items as best possible and meet him, don't be confrontational, act like all you want to do is please him, in other words, kiss ass.

#33618 - 01/28/04 10:17 AM Re: Bend radius for SEU  
Electricmanscott  Offline
Joined: Jan 2002
Posts: 1,457
Holden, MA USA
Rather than kiss his ass tell him to kiss yours. [Linked Image] He should show you what he wants corrected. He should also give you code violations in writing with refrences to back them up.

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