35
DO NOT DIVE.
100
DO NOT DIVE.
ELECTRICAL REQUIREMENTS
Permanently Connected Equipment Assembly with Pump(s), Heaters, Luminaine, Ozone, Swim Spa
Side Control(s), Pump shut off device, and Audio/Video Components.
Note: Some of the above components may be optional or not available with every swim spa model.
ELECTRICAL REQUIREMENTS
HAVE YOUR ELECTRICIAN READ THE FOLLOWING INFORMATION
BEFORE INSTALLATION BEGINS
Electrical connections made improperly, or the use of wire gauge sizes for incurring power
which are too small, may continually blow fuses in the electrical equipment box, may dam-
age the internal electrical controls and components, may be unsafe and in any case will void
your warranty.
It is the responsibility of the swim spa owner to ensure that electrical connections are made
by a qualified electrician in accordance with the National Electrical Code and any local and
state electrical codes in force at the time of installation.
These connections must be made in accordance with the wiring diagrams found inside the
control box. This equipment has been designed to operate on 60Hz alternating current only,
240 volts are required. Make sure that power is not applied while performing any electrical
installation. A copper bonding lug has been provided on the electrical equipment pack to
allow connection to local ground points. The ground wire must be at least 8 AWG copper
wire and must be connected securely to a grounded metal structure such as a cold water
pipe. All Master Spas equipment packs are wired for 240 VAC only. The electrical service
for your swim spa must include a 50 AMP switch or circuit breaker to open all non-ground-
ed supply conductors to comply with section 422-20 of the National Electrical Code. A dis-
connect must be installed and be readily accessible to the swim spa occupants, but installed
at least five feet from the swim spa. A Ground-Fault circuit interrupter (GFCI) must be used
to comply with section 680-42 of the National Electric Code. A ground fault is a current
leak from any one of the supply conductors to ground. A GFCI is designed to automatically
shut off power to a piece of equipment when a ground fault is detected. The MP Swim Spas
are equipped from the factory with a pre-installed 50A internal GFCI breaker and will not
need to have one installed.
The 50A non-GFCI protected service must be 240 volt, 3 wire plus ground (#6 AWG cop-
per with minimum #8 AWG copper ground).
Route service in to the swim spa junction box located inside the spa behind skirt access panel
“B” (see Glossary of Swim Spa Terminology). Refer to wiring schematic inside swim spa
junction box for proper power connections to terminals. The MP Swim Spas are equipped
from the factory with a pre-installed 50A GFCI breaker to power the propulsion system and
spa side equipment. The 50A non-GFCI protected service shall be connected to the appro-
priate terminals within the swim spa junction box which feed the internal 50A GFCI. This
must be a “dedicated” service. The term “dedicated” means the electrical circuit for the spa is
not being used for any other electrical items (patio lights, appliances, garage circuits, etc.). If
the spa is connected to a non-dedicated circuit, overloading will result in “nuisance tripping”
which requires resetting of the breaker switch at the house electrical panel.
201412
Configuration 3 - 240V, 50A Service
Note: Electrical requirements by model is shown in Model Specifications. Only electrical configurations pertain-
ing to the models referenced in this manual are shown.
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