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DO NOT DIVE.
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DO NOT DIVE.
ELECTRICAL REQUIREMENTS
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 damage
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.
The supply wiring to the swim spa must utilize a symmetrically grounded system. The swim
spa must not be wired to electrical systems utilizing no ground (IT) or TN-C grounding. Be sure
to have a licensed electrician examine and ensure proper grounding is provided. 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-grounded supply conductors
to comply with section 422-20 of the National Electrical Code. A disconnect 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 copper
with minimum #8 AWG copper ground).
Route service in to the swim spa junction box located inside the swim 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 appropriate 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 swim spa is not being used for any other electrical items (patio lights, appliances, garage
circuits, etc.). If the swim 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 pertaining to the models referenced in this manual are shown.
