Independent circuit for hot tub

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  #1  
Old 12-14-14, 05:16 PM
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Smile Independent circuit for hot tub

Have been asked to run a short (4 feet in lenght) 120 V 20A circuit from a mobile home flush main panel (100A). Four feet away from the Mobile Home sits on the concrete slab afore the entire front of the Mobile Home a small shed, which I will ajoin/fasten to, the weather proof outlet box containing the GFI. I will attach it about one above the slab onto the side of the shed for it's support. The main issue is that the UF or Schedule 40/80 race-way will need to go underneath the 3 inch slab. Once I break through the concrete slab how deep must I lay my conductor/race-way?Any and all input welcome. Thanx.
 
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Old 12-14-14, 05:45 PM
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I'm not following you. Do you mean you are just cutting a narrow chase thru the 3" cement pad for the electric ?
 
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Old 12-14-14, 06:12 PM
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You cannot use UF to feed a hot tub. You need conduit with individual conductors and an insulated ground.

Minimum burial depth is 12 " for a 20 amp 120 volt circuit. Others are deeper.
 
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Old 12-14-14, 06:31 PM
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@PJmax__Yeah, gotta rent or borrow a tool to make the cut. (1st time cutting concrete). How wide will I have to make it do ya think? in order to dig the minimum 12 inches pcboss advised that is. thanx
 
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Old 12-14-14, 07:28 PM
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Have been asked to run a short (4 feet in lenght) 120 V 20A circuit from a mobile home flush main panel (100A).
Are you a contractor? Is this a side job?
 
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Old 12-14-14, 08:24 PM
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@Casual Joe___Yes, I am a licensed C-20 (primary) and C-10 (secondary) small fry electrical contractor (diagnostics mostly), and an occasional panel up-grade. Mobile homes are a special case I know. Permit will be pulled.
 
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Old 12-14-14, 08:49 PM
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You can maintain 6" under the concrete if heavywall/galvanized pipe is used.
 
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Old 12-15-14, 07:12 AM
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Various issues come to mind here with a 4 foot hookup.

Clearance: your electrical hookup for the tub cannot be closer than 5' from the rim unless it is a single locking receptacle in weatherproof box (GFCI breaker req'd). No other electric allowed within 10' of the rim. If no receptacle, then an approved disconnect box is req'd on hard wired tubs.

Bonding: rebar in the concrete needs to be bonded to the equipotential grid with solid #6 copper, the mobile home siding and any other metal within 10' also need to be bonded, in addition to the internal components of the tub like the pump and heater.
 
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Old 12-15-14, 07:23 AM
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@Casual Joe___Yes, I am a licensed C-20 (primary) and C-10 (secondary) small fry electrical contractor (diagnostics mostly), and an occasional panel up-grade. Mobile homes are a special case I know. Permit will be pulled.




What does C-20 and C-10 mean? I am not familiar with those designations.
 
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Old 12-15-14, 07:49 AM
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  #11  
Old 12-15-14, 10:05 AM
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Smile Thank-you

@CasualJoe____A C-10 is a Ca. (California) state contractor license. A C-20 is a Ca. state HVAC (heating, ventilation Air Conditioning License. Thanx for all your help!!
 
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