I currently have a 100 amp sub panel running off my 200 amp main. It is currently running 2 A/C units my hot tub and the pool pump.
I am moving my pool equipment, including the pump, about 35 feet away and the new pool control panel has a built in sub panel with 8 breaker slots. I want to put this panel in on its own run so it will control the pool pump, pool light, a few outside lights, and a couple outlets that the wife can plug christmas lights into in December.
The run is 135 ft from the main panel. I have 1 1/2" plastic conduit already installed in the attic, under the porch joists, and then buried 36" for 40ft to where I will mount the sub panel.
Questions:
#1- I already have 500' of #4 THHN stranded wire. Will that work for this run?
#2- I will be running a red, white, and black wire for power. Can I add a new grounding rod at the panel and or just run a ground the 40 feet from the other sub panel to the new sub panel. Or will I need to run a new ground wire from the main to the sub with the #4 leads?
#3- What size break can I use in the main panel to feed the sub?
I currently have a 100 amp sub panel running off my 200 amp main. It is currently running 2 A/C units my hot tub and the pool pump.
I am moving my pool equipment, including the pump, about 35 feet away and the new pool control panel has a built in sub panel with 8 breaker slots. I want to put this panel in on its own run so it will control the pool pump, pool light, a few outside lights, and a couple outlets that the wife can plug christmas lights into in December.
The run is 135 ft from the main panel. I have 1 1/2" plastic conduit already installed in the attic, under the porch joists, and then buried 36" for 40ft to where I will mount the sub panel.
#2- I will be running a red, white, and black wire for power. Can I add a new grounding rod at the panel and or just run a ground the 40 feet from the other sub panel to the new sub panel. Or will I need to run a new ground wire from the main to the sub with the #4 leads?
You will need an insulated ground wire in there as well. The ground and neutral in the sub must be separated and the neutral floating (not bonded) Also since the panel may be considered a separate structure a ground rod most likely will be required.
I think the wire is OK for in conduit wet locations. It cant be direct burial but in conduit should be OK. Looked at the wire and it is says:
E102470 S (UL) MTW or THHN or THWN-2 or Gasoline and oil resistant II 4 AWG CU 600 V VW-1
Specs say:
THHN and THWN-2 is a multi-purpose building wire used in conduit and cable trays for service, feeders and branch circuits in commercial and industrial applications. It is also used as a conductor in NM-B, UF-B, SER, SEU and MC. THHN is rated for 600 Volts and has a heat capacity of up to 90* C.
Enter your desired electrical wire length in quantity box.
Can be used in wet or dry locations
Made with annealed (soft) copper, compressed
Insulation is high heat and moisture resistant polyvinyl chloride (PVC)
Jacket is abrasion, moisture, gasoline and oil resistant nylon
#1- #8 green coated copper wire good for the ground wire?
#2- Will I need to run the #8 wire from the main 200 amp that is 135 ft away or can I just run a ground wire from the sub panel that is 35 ft away to the new panel and save the 100 ft of wire?
#3 Should I install a grounding rod at the new panel also?
I don't believe a sub panel needs 2 ground rods. There is no such thing as a bonding rod.
Ideally you should be asking the inspector for this project what he wants to see.
A ground with a proven resistance of 25 ohms or less is required. Lacking the test, the requirement is met by using 2 rods. Since the test would require test equipment that most electricians do not possess, they use the 2 rod exception.
Respectfully. I posted the question of sub panels being rated for service equipment at that othe sight.
Seams if a three wire feed (grounding and grounded conductor are the same single conductor) the panel needs to be service rated. If there is a three wire with a ground ( grounding and grounded conductors are separate conductors) the panel does not need to be service rated
2005 was the last code cycle that allowed 3 wire feeders to outbuildings.
as far as being service rated, check out 225.36.
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