0
What gauge wire do you need to connect a 240V 50 amp spa panel to the main breaker box?
Wiki User
∙ 10y ago
NEC Table 310.16 says you will need #6 copper, with a decent insulation on it, like THHN,
or # 4 Aluminum, again with good insulation.
Indoors - Article 680.43(A) says you will need one more regular outlet within 6-10 ft from the tub or spa, if it is "indoors". This must be on a GFI.
ALL metal parts of everything must be bonded. - that's a simple restatement of several sub-paragraphs.
Have fun!!
Wiki User
∙ 15y ago
Wiki User
∙ 10y agoThat will be in your electric wiring regulations, see an electrician if you don't know.
<<>>
A #8 copper conductor with an insulation factor of 90 degrees C is rated at 55 amps. If the spa operates at a continuous rating the feeder conductor has to be calculated at 80% capacity. 55 x .8 = 44 amps. If the spa was mine I would use a #6 copper conductor with an insulation rating of 90 degrees C which is rated at 75 amps. De rated by 80% will give it a working amperage of 60 amps. Using a larger size wire also gives you a longer distance to place the spa from the distribution panel with out having voltage drop enter into the equation. Don't forget that a ground fault device needs to be in the circuit that supplies a spa or hot tub.
Robert Hawes
4
Add your answer:
Earn +20 pts
How do you wire a 15 amp 120V breaker in a 240v 30 amp breaker panel?
Look to see if the 30 amp panel is fed with a two wire or a three wire. If it is a two wire then you are out of luck. If the panel is fed with a three wire then the panel should have the neutral terminated in the panel. It is this neutral that you need for 120 volt connections. You didn't state how many panel slots there are in the panel. If you are able install a 15 amp breaker into the panel and connect the wires going to the load. The black wire will go to the breaker and the white wire will go to the neutral bar in the panel.
Can GFCI circuit breaker handle a 240V circuit with a 120V circuit sub-paneled off if it?
I don't know if you are trying to ask if you can run a 240V panel off a GFCI or run a 120 V sub panel off of a GFCI. Can you clarify please,,,Thanks
What do you need and how can you install a ground cable if your 240V outlet doesn't have a ground wire?
You need a 3 conductor wire with ground. For example if you had a 30 amp breaker for that outlet you would need 10awg 3w/ground. That's 10 gauge 3 conductor with ground and replace the old wire back to the panel.
How can voltage increase to 240V when only 120V is coming from the breaker box?
That could only happen if the neutral wire (white) becomes disconnected at either the panel, the meter base or the transformer.
If you install a 30A 240V GFI breaker will this be ok or will the cycles the dryer has prematurely fail the breaker?
I suspect you mean GFIC breaker. The dryer will not cause the breaker to fail.
How do you wire a 15 amp 120V breaker in a 240v 30 amp breaker panel?
Look to see if the 30 amp panel is fed with a two wire or a three wire. If it is a two wire then you are out of luck. If the panel is fed with a three wire then the panel should have the neutral terminated in the panel. It is this neutral that you need for 120 volt connections. You didn't state how many panel slots there are in the panel. If you are able install a 15 amp breaker into the panel and connect the wires going to the load. The black wire will go to the breaker and the white wire will go to the neutral bar in the panel.
What are the steps in connecting 120V to a 240V 60A air condition panel?
you should have three wires into the panel. two of them go to the double breakers or pull switch and the last is the ground lead. You can pick up 110 vac from one side of either breaker and that ground connection. DO NOT connect to the both breaker wires as that will be 220 vac
Can GFCI circuit breaker handle a 240V circuit with a 120V circuit sub-paneled off if it?
I don't know if you are trying to ask if you can run a 240V panel off a GFCI or run a 120 V sub panel off of a GFCI. Can you clarify please,,,Thanks
What do you need and how can you install a ground cable if your 240V outlet doesn't have a ground wire?
You need a 3 conductor wire with ground. For example if you had a 30 amp breaker for that outlet you would need 10awg 3w/ground. That's 10 gauge 3 conductor with ground and replace the old wire back to the panel.
How can voltage increase to 240V when only 120V is coming from the breaker box?
That could only happen if the neutral wire (white) becomes disconnected at either the panel, the meter base or the transformer.
If you install a 30A 240V GFI breaker will this be ok or will the cycles the dryer has prematurely fail the breaker?
I suspect you mean GFIC breaker. The dryer will not cause the breaker to fail.
How can you plug 2000 watts 240v into a 120v 20 amp breaker with out replacing your breaker and all the plugs on the line?
You can't.
How do you run dedicated 240V lines for power tools?
Answer for USA, Canada and countries running a 60 Hertz supply service.One 240 volt receptacle fed from a two pole breaker from the distribution panel. The size of the breaker is determined by the load current and the wire sized accordingly.
If you have spare fuses but they are not together how can you run a new 240V line?
Move things around until you have space for a double-pole breaker, which is required for 240V. Don't be stupid and connect 2 separate breakers in non-adjacent positions. It might work, and then again it might fry something too.
How much voltage should be in 2pole circuit breaker?
In America, a 2-pole breaker is controlling 240V. 120V per leg.
Can a 200A 240V house panel be fed by number 2 conductors from a service entrance meter panel with 200A main breaker?
Absolutely not. #2awg conductors are only good for about 100 amps depending on Cu or al. see nec table 310-16.
Would a 30A 240V circuit breaker be too large to safely support a either a 20A or 23A 240V bandsaw?
Yes it will operate it fine.
