How can I tell what
voltage my hot tub runs on?
tub normally operates on one of 3 wiring configurations.
First is a standard 110-120vac which can either plug
into a wall outlet or be hard wired from the main or
220-240vac using 3 incoming wires.
220-240vac using 4 incoming wires.
this example you see a Green (ground) wire on the top.
Red is not used. Black connects to Line 1. And White to
Neutral. (3 wires). This means 110-120vac from the house
will be applied to the hot tub. ALL components will be
NOTE: Hot tubs running on
110-120vac typically will have a minimum "amp or
amperage" requirement. Common are either 15a service or
20a service. You will need to confirm you are supplying
the spa with the minimum service needed to operate the
spa or you can damage wiring or equipment or even have a
this example you see the Green (ground) on the top, Red
in Line 2, and Black in Line 1 (3 Wires). There are no
wires connecting to the Neutral lug.
This means all components
operate on 220-240vac.
this example you have Green(ground) service on top, Red
to Line 2, Black to Line 1, and WHITE to neutral. (4
This means components in
this spa can operate on either 110-120vac OR 220-240vac
depending on how the spa is wired.
Usually the pumps and heater are wired for 220-240vac
and the control system and some other components operate
on 110-120vac. Check each component to see what its
operating on. You can also check the voltage to the
component when the spa is operating.