43
DO NOT DIVE.
100
DO NOT DIVE.
ELECTRICAL REQUIREMENTS
This configuration requires 2 independent, dedicated services,
a 240V, 50A Service (non-GFCI) & a 240V, 50A GFCI Service
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. Each of the electrical services for your
swim spa must include a properly rated 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 to power the propulsion sys-
tem and will only need a GFCI installed on the 50A service powering the spa control system.
The 50A non-GFCI protected service must be 240 volt, 3 wire plus ground (#6 AWG copper
with minimum #8 AWG copper ground). The 50A GFCI protected service must be 240 volt, 3
wire plus ground (#6 AWG copper with minimum #8 AWG copper ground).
Route services 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. 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. The 50A GFCI protected service shall
be connected to the appropriate terminals within the swim spa junction box which power
the swim spa control system. These must be “dedicated” services. 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
ELECTRICAL REQUIREMENTS
CONFIGURATION 7 - 240V, 50A SERVICE & 240V, 50A GFCI SERVICE
NOTE: Electrical requirements by model is shown in Model Specifications. Only electrical
configurations pertaining to the models referenced in this manual are shown.