I have a project that involves a parking lot remodel. In this project some but not all the lights will be moved. They are fed thru buried conduit. Since the entire conduit will not be exposed we will need to splice at some point or points. What is the best way to do this? The lot is and will be paved.
Buried Conduit Splicing
- Thread starter santoro
- Start date
- Status
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Re: Buried Conduit Splicing
Pull the conductors back to a j box or handhole.
Splice the conduit. Repull new longer wire to the other termination.
Pull the conductors back to a j box or handhole.
Splice the conduit. Repull new longer wire to the other termination.
flightline
Senior Member
Re: Buried Conduit Splicing
If you can pull the conductors back 1 pole, after exposing the conduit just add to it as you would any underground conduit run. It's real easy with Schedule 40 PVC. With IMC or GRSC it would be cut and thread and an 3 piece coupling. While you can use a no-thread coupling. I really don't care for this method, since while quick and inexpensive to buy, I have had instances where we have found, through natural ground movement, or poor installation, the coupling has slipped and pulled away, and over time, the conductors have faulted to the edge of the coupling.
If you have some extra money, an precast handhole with cast iron frame & cover would be a nice way to extend the run. Just place it in a drive aisle. Don't skimp on it though, it will see of lot of weight & traffic. We were working an open today, and had to have city tow relocate a Jeep Grand Cherokee Limited, since it was parked on top of a manhole cover. Time is money, and the owner was already parked there for 3 days.
[ March 12, 2003, 02:45 PM: Message edited by: flightline ]
If you can pull the conductors back 1 pole, after exposing the conduit just add to it as you would any underground conduit run. It's real easy with Schedule 40 PVC. With IMC or GRSC it would be cut and thread and an 3 piece coupling. While you can use a no-thread coupling. I really don't care for this method, since while quick and inexpensive to buy, I have had instances where we have found, through natural ground movement, or poor installation, the coupling has slipped and pulled away, and over time, the conductors have faulted to the edge of the coupling.
If you have some extra money, an precast handhole with cast iron frame & cover would be a nice way to extend the run. Just place it in a drive aisle. Don't skimp on it though, it will see of lot of weight & traffic. We were working an open today, and had to have city tow relocate a Jeep Grand Cherokee Limited, since it was parked on top of a manhole cover. Time is money, and the owner was already parked there for 3 days.
[ March 12, 2003, 02:45 PM: Message edited by: flightline ]
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Re: Buried Conduit Splicing
I didn't mention the flush j-box method. Its not the best for a parking lot. Plus I have heard of problems in Alaska due to water getting in conduits and freezing, it tends to move the conductors.
I didn't mention the flush j-box method. Its not the best for a parking lot. Plus I have heard of problems in Alaska due to water getting in conduits and freezing, it tends to move the conductors.
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