The spa is already on the driveway. That is how most of these calls start. A homeowner bought a hot tub, the delivery crew set it on a pad or a deck, and someone handed them a spec sheet and said "you'll need an electrician." Now they are calling you, they want it running by the weekend, and they have no idea that the answer involves a load calculation, a permit, and an inspector.
Hot tub and spa wiring is one of the better jobs an electrical shop can take. It is a defined scope, it is usually a full day or less once the trenching or run is sorted, and the customer is motivated because a cold tub sitting unused is a daily irritation. But the intake call decides everything. Scope it wrong on the phone and you show up with the wrong disconnect, the wrong wire, or no panel capacity. Miss the call entirely and the homeowner dials the next electrician, because a spa buyer who is already impatient is not waiting two days for a callback.
Here is what to pull out of that first conversation.
Get the spa's electrical spec before anything else
Every portable spa ships with a spec sheet or a placard on the equipment bay, and it tells you most of what you need. Ask the caller to go read it, or better, to photograph it and text it over. Almost every homeowner can do this in two minutes, and it turns a vague call into a scoped job.
What you want off that sheet:
- Voltage. Most full-size spas run on a dedicated 240 volt circuit. Smaller "plug and play" models run on 120 volts and may be designed to plug into an existing outlet, which is a completely different conversation and sometimes not a job at all.
- Amperage. The manufacturer will state a required circuit size. 50 amp is common on larger tubs, but 40 and 60 show up too, and swim spas can be much larger or require more than one circuit.
- Number of circuits. Some swim spas and dual-zone units need two feeds. Find this out on the phone, not on the truck.
- Whether the unit is convertible. Plenty of spas can be wired for either 120 or 240. What the homeowner wants and what the spa is currently jumpered for are not always the same thing.
If the caller cannot find the sheet, get the brand and model number and look it up yourself. Guessing at a spa's load from the tub's size is how a job goes sideways.
Ask about the panel, because that is where jobs die
A spa circuit is a substantial addition to a residential service. The second question after the spa spec is always about the existing electrical service.
Ask for the main breaker rating: 100, 150, or 200 amps. Ask how old the home is. Ask whether there is open space in the panel, and whether the caller can send a photo of the panel with the door open. That photo answers three things at once: the panel brand, the available spaces, and whether you are looking at a Federal Pacific or Zinsco panel that changes the whole quote.
Then ask what else is in the house that draws heavily. Electric range, electric dryer, central air, a heat pump, an EV charger, a well pump. A 100 amp service with an EV charger already installed may not have room for a 50 amp spa without a load calculation and possibly a service upgrade. That is a much larger project than the homeowner is expecting, and it is far kinder to raise the possibility on the phone than to spring it on them after a site visit.
Hear it handled live. Answara's own AI receptionist answers our main line. Call (857) ANSWARA and ask it whatever a customer would ask you, or see plans and get set up.
The GFCI, disconnect, and bonding questions
Spa and hot tub circuits sit in one of the more heavily regulated corners of residential wiring, and for a plain reason: it is a body of water full of people, wired to a 240 volt feed. Three requirements shape almost every one of these installs. Treat what follows as general orientation and verify the specifics against the current code edition and any local amendments your jurisdiction has adopted, because the details do shift between cycles and between towns.
GFCI protection. Spa circuits require ground-fault protection. In practice this is usually satisfied by a GFCI spa panel or a GFCI breaker feeding the unit. Homeowners frequently do not know this and will tell you a previous handyman "just ran a wire." If the caller describes an existing spa feed with no GFCI anywhere in the path, flag it as a correction item during intake so nobody is surprised by the quote.
A disconnect the bather can reach but not from the water. Code requires an accessible emergency disconnecting means near the spa, positioned within sight of it and beyond a minimum distance from the water's edge. That distance is the thing to confirm against your current code book. What matters at intake is the geometry: you need to know where the tub is sitting relative to the house so you can tell whether a wall-mounted disconnect works or you are setting a post.
Bonding. Metal parts associated with the spa, including the equipment, certain metal components in and around the tub, and in many cases metal within a set distance of it, have to be bonded together. If the spa sits on a deck with a metal railing, or near a metal fence, gas line, or a pool ladder, that is bonding scope. Ask what surrounds the tub.
Ask one more question here: has the spa already been set in place, and is the equipment bay accessible? A tub pushed tight against a house wall with the panel side buried is a real problem, and you would rather learn that on the phone than after the truck is parked.
Site and run details to capture over the phone
The remaining questions are about the physical run and the paperwork.
Where is the panel, and where is the spa? Ask for a rough distance in feet and what is between them. A 60 foot run across a finished basement ceiling is different from 60 feet of trench under a lawn, and both are different from a run that has to cross a concrete patio the customer poured last summer. Underground means trench depth, conduit, and whether the homeowner understands you may be cutting sod.
Ask about the surface the spa sits on. A poured pad, a deck, pavers, or gravel each change how the disconnect and bonding get handled.
Ask who owns the property. Tenants cannot authorize this work.
And set the permit expectation on the first call. Spa circuits are permitted work in most jurisdictions, with an inspection before the tub is energized. Homeowners who bought a spa on Friday and want it hot by Sunday need to hear the real timeline from you, including that the inspector's schedule is not yours to control. Saying this early costs you a slightly harder conversation and saves you an angry one later. The electrical resources hub covers more on how permit and inspection steps fold into residential jobs like this.
Why the spa call you miss goes to the next electrician
Spa wiring leads have a short shelf life. The homeowner has just spent a large amount of money on a tub that does nothing until it is wired, and the spa dealer typically hands out two or three electrician names at delivery. Whoever answers first and sounds like they have done this before usually gets the job.
That is a hard test for a small electrical shop. You are in an attic, on a ladder, or driving between calls, and the spa dealer's referral rings out to voicemail. Evenings are worse, because that is exactly when a homeowner standing next to a cold tub picks up the phone. A large share of callers never leave a message. They just work down the list.
Some shops close that gap by pairing the crew with an AI receptionist like Answara, which answers around the clock and captures the spec sheet details, the panel size, the distance from panel to tub, and the address, so the callback starts from real information instead of a name and a number.
The job itself is not the hard part. Spa circuits are repeatable work your team has done many times. The part that decides whether you get it is a two minute phone conversation, and whether anyone was there to have it.