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47 votes

Why am I getting an electric shock from the water in my hot tub?

Edit: This is sounding more and more like a problem with either a neighbor's electrical or the utility's supply. See last entry. DON'T get in that hot tub again! The "very small" shock was due to ...
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38 votes
Accepted

My inflatable hot tub says "don't use with an extension cord"... but can I?

I think you have likely answered your own question. The use of an extension cord could cause a voltage drop, especially since the factory cord is long already and the spa probably has an electric ...
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  • 33.6k
30 votes

My inflatable hot tub says "don't use with an extension cord"... but can I?

The basic reason is that if they said, "Feel free to use an extension cord", someone would connect up a 50m, 3A, two-core cable with no Earth and a loose socket. They would then sue the company when ...
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15 votes

Why am I getting an electric shock from the water in my hot tub?

I had an electrician to check out the problem and: I am in the UK and there is only live and neutral at the meter (earth and neutral are the same wire at that point) The Hot Tub water is directly ...
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  • 569
13 votes

Alternative GFCI Wiring in Strict 240V Scenario?

Put the GFCI breaker at the supply panel. Done & dusted! Now, I think it’s very prudent (and generally mandated) to have a local disconnect with a GFCI breaker... Not quite right. There is no ...
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9 votes

My inflatable hot tub says "don't use with an extension cord"... but can I?

I have always heard that the reason for the "no extension chords" is because they are not supposed to be used for permanent installations, only temporary, i.e., Christmas lights. Extension chords are ...
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  • 57.4k
8 votes

My inflatable hot tub says "don't use with an extension cord"... but can I?

The manufacturer will be guarding against both voltage drop on the supply (which could affect the operation) and creating too high a fault loop impedance (which could affect the disconnect time of the ...
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  • 2,360
8 votes

My inflatable hot tub says "don't use with an extension cord"... but can I?

The issue is electrical drownings One thing people really don't understand about electricity and water: a shock that would be trivial anywhere else is fatal when water is around. You're hit with a ...
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7 votes

Can conduit be laid on the ground under a low deck?

The deck acts as the protection required by code. You could even use UF under the deck without conduit. The conduit would be needed prior to exiting from underneath the deck. Make sure you use a wet ...
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  • 100k
7 votes

Alternative GFCI Wiring in Strict 240V Scenario?

Yes, GFCIs are electronic devices that consume (a tiny amount of) power. Here are a couple GFCI ICs: https://www.ti.com/lit/ds/symlink/afe3010.pdf https://www.onsemi.com/pdf/datasheet/ncs37010-d.pdf ...
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  • 2,980
6 votes

My inflatable hot tub says "don't use with an extension cord"... but can I?

I have seen the same rules on devices for a bathroom. In my opinion its all about exposing bare wires. If the two (the extension and the power cord) are not a waterproof connection and resting on a ...
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5 votes

Hot Tub Disconnect Box 220V with a neutral and ground/No neutral in main panel

Connect the white wire to the bar the other white wires are connected to -- it is not rare for a main service panel to have a combined neutral and ground busbar, as that is the (only!) point where ...
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5 votes

How do I know if my service panel will accommodate a 240v circuit breaker

The panel can indeed support a 240V breaker. The question you should ask is, is there space in the panel to physically accommodate additional breakers? Based on the model number, your panel should ...
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  • 129k
5 votes
Accepted

Hot tub wiring extending existing wire

Adding a weather proof box at the tub is legal.
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  • 100k
5 votes

My inflatable hot tub says "don't use with an extension cord"... but can I?

To Avoid Fire As noted in other answers and comments, there are issues related to wire size and length that can cause overheating if not appropriately dealt with, and the issue of waterproofing the ...
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  • 5,611
5 votes

What to do with the neutral in a 240V 2-pole hot tub disconnect?

You never switch the neutral, well, "never" is a strong word, sometimes some special generator installations switch the neutral, but almost never should you switch the neutral, just the 2 ...
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5 votes

Can I run multiple wires through conduit for a hot tub and an outlet?

You can, yes (provided you respect conduit fill limits), but usually there's an easier way. Since hot tubs need a local disconnect anyway, you can use a small subpanel (often called a spa panel) to ...
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  • 6,269
5 votes

How to hoist hot tub out of surrounding deck?

I'd be cautious building something like this with limited woodworking experience. Typical framing like this would have 1/2" bolts and your rough sketch is similar to other stable gantries. I see ...
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  • 57.4k
5 votes

Will #2 THHN Aluminum fit a 90 Amp breaker?

According to the brochure for the Square D QO 90 Amp Breaker it can handle 4 AWG to 2/0 AWG, so yes. And thanks to NoSparksPlease, Homeline too.
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5 votes

Alternative GFCI Wiring in Strict 240V Scenario?

Since all you need to do is power the GFCI itself, a small transformer can fix this As already mentioned, GFCI breakers require a neutral connection to power their internal electronics. However, ...
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4 votes

How do I know if my service panel will accommodate a 240v circuit breaker

TL;DR: Yes, your panel should accommodate the breaker, provided you have space. Quick lesson in North American circuitry. The supply to your house is 240 v, split phase. This means that there are ...
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4 votes

Electrical - 50 amp abandoned wiring from hot tub connected to breaker (outside)

If you're going to leave the breaker, you could just shut it off and/or disconnect the wires connected to it. Installing a lockout on the breaker, would prevent anybody from turning it on. You should ...
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  • 129k
4 votes
Accepted

Spa/hot tub A/C pump hums, but does not run

After pulling the motor out (which required draining the spa and disconnecting the PVC connections) and removing the cover, I found another capacitor. Googling the part number indicates that this is a ...
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4 votes
Accepted

Do I need chemicals if I drain my hot tub after 3 days?

Fill it on Friday, and use it all weekend. On Monday you chlorinate it, and let it sit chlorinated all week. This will prevent bacterial growth from taking over your filter. Drain and refill on Friday ...
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  • 4,671
4 votes

Possible to convert spa pump motor to bench mounted grinder?

A spa pump motor is usually what's called a "C face" design, meaning that the motor mounts directly to the pump, which is what mounts to the spa. When you take it off of the pump, you have no mounting ...
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  • 14.5k
4 votes

Run for final Hot Tub Connection

PVC to liquidtight works, but with a caveat or two The good news is that it's possible to transition from a PVC conduit to liquidtight flexible conduit without too much work. However, you can only do ...
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4 votes

Do I need a sub-panel near my hot tub?

Normally wiring like this could go into a GFCI disconnect and directly into a prewired hot tub. If you purchased individual parts, then you would go to a sub panel adding separate GFCI breakers for ...
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  • 57.4k
4 votes

can I do this to support a hot tub on a deck

Disclosure: I'm not an engineer. Good drawing; we can see what you're thinking of. The structure and foundation supporting the tub must be sturdy enough to support the weight of the tub, water, and ...
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3 votes

Hot Tub Disconnect Box 220V with a neutral and ground/No neutral in main panel

Neutral and ground are kept separate absolutely everywhere, except one place: the main panel. Here, it is OK to simply use one bus for both neutral and ground. You will probably find a lot of ...
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3 votes
Accepted

Keeping hot tub (spa) circuit line inside attic properly

In my area if the cable is for future use the current carrying conductors in the panel board must be capped and marked for future use. The ground conductor if bare secured to the ground buss, if ...
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  • 100k

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