We recently designed a submersible pump installation, 700 HP pumps at 250+/- feet of water depth. We specified that the 500 MCM power conductor cables (approx. 1200') be continuous from MCC to motor. My question is, since no known similar application was available, if damage to the hypalon insulation were to occur, what is the best method of splicing?
Submersible cable installation requirements
- Thread starter wleewhite
- Start date
- Status
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Re: Submersible cable installation requirements
What voltage?
If 460, I have made many submersible pump splices, up to 300 ft deep, have done with compression connectors, and either heat shrink - heavy wall w/ sealer, or 33+ and skotch kote. If the splice will not be submerged then use one hole lugs and insulate. I would put a splice at the well head.
What voltage?
If 460, I have made many submersible pump splices, up to 300 ft deep, have done with compression connectors, and either heat shrink - heavy wall w/ sealer, or 33+ and skotch kote. If the splice will not be submerged then use one hole lugs and insulate. I would put a splice at the well head.
- Location
- Illinois
- Occupation
- retired electrician
Re: Submersible cable installation requirements
How are you going to be able to install the wire in a continuous length from the MCC to the motor? In the deep wells that I have worked on there was always a splice box at the well head. There is a very sever risk of damage to the conductors when they are installed if you make the installation in that manner and a large increase in the labor required to install the wire. Why do you have an objection to a splice at the well head?
Don
I'm closing this topic here and moving it to the NEC section as it has nothing to do with AFCIs.
[ December 13, 2003, 07:57 AM: Message edited by: don_resqcapt19 ]
How are you going to be able to install the wire in a continuous length from the MCC to the motor? In the deep wells that I have worked on there was always a splice box at the well head. There is a very sever risk of damage to the conductors when they are installed if you make the installation in that manner and a large increase in the labor required to install the wire. Why do you have an objection to a splice at the well head?
Don
I'm closing this topic here and moving it to the NEC section as it has nothing to do with AFCIs.
[ December 13, 2003, 07:57 AM: Message edited by: don_resqcapt19 ]
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Re: Submersible cable installation requirements
Good point Don on the cable being continuous to the MCC. The first couple of wells I did we ran the drop cable continuous to the motor controller, that was hard cable to pull in. What I do now is install a j-box on the well casing just under the well head where it is out of the way when pulling the pump. It may not work for the 700 HP being discussed, but I've done one with a flush j-box in the concrete pad next to the well head.
Just curious, for the 700 HP, what is the head and flowrate?
Good point Don on the cable being continuous to the MCC. The first couple of wells I did we ran the drop cable continuous to the motor controller, that was hard cable to pull in. What I do now is install a j-box on the well casing just under the well head where it is out of the way when pulling the pump. It may not work for the 700 HP being discussed, but I've done one with a flush j-box in the concrete pad next to the well head.
Just curious, for the 700 HP, what is the head and flowrate?
- Status