41
DO NOT DIVE.
100
DO NOT DIVE.
ELECTRICAL REQUIREMENTS
This configuration requires 2 independent, dedicated services.
Dual 240V, 50A GFCI Services
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 war-
ranty.
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 con-
nected 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 elec-
trical 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.
Each 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. One 50A GFCI service will be connected to the swim spa side
equipment control system. The second 50A GFCI service should be connected to the swim side
equipment control system. Refer to the wiring schematic inside each swim spa control system for
proper power connection to terminals. 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 6 - Dual 240V, 50A GFCI Services
Note: Electrical requirements by model is shown in Model Specifications. Only electrical configurations pertain-
ing to the models referenced in this manual are shown.
