Underground Repair

kwoods · 09-22-2006, 04:49 PM

I need to repair an underground feeder to a sub panel. It is 500 mcm wire in a 4" pvc conduit at 480 volts. I would like to put in a flush with grade splice box to repair the conduit. The wire is not broken, but is is skinned. The wire is type thhn so I don't think I can just use and underground splice kit without a box. The box that I am being advised to use is open bottom Quazite. It is in a lawn location with little or no traffic. Any advice or oppinions would be appreciated.

mdshunk · 09-22-2006, 04:54 PM

What's the operating voltage of these conductors? If it's just 240 or 480, and it was just skinned, I wouldn't hesitate to paint it with 3M's liquid electrical tape and cover with cambric. Repair the broken conduit in that area with the lineal split conduit repair sleeve.

You can splice 500MCM underground with a repair kit that has an H-Tap and a heat shrink sleeve. You need one kit per conductor.

If you want to do a grade level splice, the Quazite box would be my 1st choice too.

kwoods · 09-25-2006, 09:02 AM

thanks for the advice. The way the conductors or all pulled back and the tight space I have to work with between building and sidewalk I need to go with a box.

09-22-2006, 04:49 PM	#1
kwoods View Profile kwoods Registered User Send Message Follow Blogs (0) Threads (2) Photos (0) Reviews (0) Projects (0) Toolbox (0) View All Activity Registered User Trade: electrical Join Date: Sep 2006 Posts: 2	Underground Repair I need to repair an underground feeder to a sub panel. It is 500 mcm wire in a 4" pvc conduit at 480 volts. I would like to put in a flush with grade splice box to repair the conduit. The wire is not broken, but is is skinned. The wire is type thhn so I don't think I can just use and underground splice kit without a box. The box that I am being advised to use is open bottom Quazite. It is in a lawn location with little or no traffic. Any advice or oppinions would be appreciated.

09-22-2006, 04:54 PM	#2
mdshunk View Profile mdshunk DGR,IABD Send Message Follow Blogs (0) Threads (9,680) Photos (0) Reviews (0) Projects (0) Toolbox (0) View All Activity DGR,IABD Trade: Electrical; Commercial and Residential Service Join Date: Mar 2005 Location: Central PA Posts: 9,680	Re: Underground Repair What's the operating voltage of these conductors? If it's just 240 or 480, and it was just skinned, I wouldn't hesitate to paint it with 3M's liquid electrical tape and cover with cambric. Repair the broken conduit in that area with the lineal split conduit repair sleeve. You can splice 500MCM underground with a repair kit that has an H-Tap and a heat shrink sleeve. You need one kit per conductor. If you want to do a grade level splice, the Quazite box would be my 1st choice too.

09-25-2006, 09:02 AM	#3
kwoods View Profile kwoods Registered User Send Message Follow Blogs (0) Threads (2) Photos (0) Reviews (0) Projects (0) Toolbox (0) View All Activity Registered User Trade: electrical Join Date: Sep 2006 Posts: 2	Re: Underground Repair thanks for the advice. The way the conductors or all pulled back and the tight space I have to work with between building and sidewalk I need to go with a box.

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