Magnum Energy MS-GFCI User Manual

MS-GFCI Instruction Sheet

Magnum Energy, Inc.
2211 West Casino Road
Everett, WA USA 98204

www.magnumenergy.com

1.0 Introduction

The MS-GFCI accessory allows a GFCI (Ground Fault Circuit Interrupter) recep­tacle to be installed directly on a Magnum inverter. This accessory includes a
duplex GFCI 20-amp rated outlet that can be easily wired and attached to the

right side of the inverter. The GFCI outlet quickly stops the flow of electricity in

the event a ground fault occurs on the device that is plugged into the inverter.
A GFCI receptacle does NOT protect against circuit overloads, short circuits,

or shocks; therefore, the MS-GFCI accessory can only be safely installed
on a Magnum inverter that includes output branch-rated circuit protection.
This integral output circuit protection is only available on Magnum Energy’s
MS2000-20B or MS2012-20B inverter/charger models.

2.0 Installation

The following pertains to attaching the GFCI accessory to the MS2000-20B
or MS2012-20B inverter/charger models.

WARNING: Installing the MS-GFCI accessory on an inverter with­out integral output circuit protection (i.e., not a -20B model) may

cause the wires to overheat and cause a fi re.

WARNING: Installations should be performed by personnel that
understand basic wiring principles and techniques, can interpret
wiring diagrams, have circuit wiring experience, and are prepared
to take a few minutes to test their work to ensure the GFCI recep­tacle is wired correctly.

WARNING: Before proceeding — to prevent accidental shock — do
not touch any parts inside the inverter until all sources of power to

the inverter are de-energized (i.e., breakers open, fuses removed).
This includes all DC power (i.e., batteries, solar, wind or hydro)
and AC power (utility power or AC generator). Use a voltmeter to
ensure all power has been removed.

2.1 Tools Required

To install the GFCI outlet panel you will need:

• Flat blade screwdriver

• Phillips screwdriver

• AC voltmeter

• Test lamp (rated at 120 VAC)

2.2 Attaching the GFCI to the Inverter

To wire the GFCI outlet to the inverter, follow these steps:

1. Remove the two Phillips screws (#8-32) that hold the existing AC access
panel to the inverter (retain for attaching the GFCI outlet panel).

2. Connect the voltmeter between the AC HOT 1 OUT and the AC NEUT OUT
terminals/wires. Ensure there is no voltage present on any terminals/
wires.

3. Connect the GFCI outlet’s 3 pre-stripped wires as follows (refer to
Figure 1 for MS2012-20B models, or Figure 2 for MS2000-20B models):

Part Number: 64-0057 Rev B 1

MS-GFCI Instruction Sheet

• Blue wire – connect to the inverter’s AC HOT 1 OUT terminal/wire

• White w/black stripe wire – connect to the inverter’s AC NEUT

OUT terminal/wire

• Green wire – connect to the inverter’s AC GROUND terminal/wire

4. Ensure each wire on the GFCI is appropriately connected to the correct
terminal/wire on the inverter.

a) On MS2012-20B models, tighten each terminal to a maximum torque
of 16 lbf-in (1.8N-m).

b) On MS2000-20B models, use an appropriate wire connector to attach
the GFCI wires to the inverter wires.

5. Attach the GFCI outlet panel to the inverter using the two Phillips screws
you removed earlier. Make sure not to pinch the wires.

Once the GFCI is installed, it is highly recommended that you test the GFCI
outlet before using it.

Can the inverter also be wired to run AC loads directly from the in­verter (i.e., hardwired) with the MS-GFCI accessory installed? Yes,

the inverter can also be hardwired to power loads directly from the inverter.
However, because the GFCI receptacle looks for a balance of current flowing
in a single hot conductor and a single neutral conductor, ensure all wiring is
directly made from the inverter (either directly from the AC wiring terminal
on MS2012-20B models, or from the pigtail wires on MS2000-20B models).
There should not be any additional wiring made from the GFCI receptacle,
this is to prevent nuisance GFCI tripping when a current imbalance occurs by
sharing the neutral or hot wires on the GFCI. For information on hardwiring
to the inverter, refer to your inverter’s owner’s manual.

3.0 Testing the GFCI Outlet

WARNING: A miswired GFCI may result in personal injury or death

due to a ground fault (electrical shock).

WARNING: Exercise extreme caution when re-applying power to
the inverter and during the entire GFCI testing process. A shock
hazard may be present.

IMPORTANT: To properly test the GFCI’s operation, the inverter must be pro­viding ~120VAC to the GFCI outlet. If the inverter is “Searching”, the Search
mode feature must be turned off to allow the inverter to provide ~120VAC.

To test the GFCI outlet:

1. Apply DC power to the inverter, and then turn the inverter on.

2. Plug the test lamp in to the GFCI outlet and turn it on. If the lamp comes
on – proceed to Step 3. If it does not:

a) Ensure the GFCI’s RESET button (see Figure 3) is not “tripped” (the
RESET button is tripped if the button is flush with the face of the TEST
button). If fully pushing the RESET button does not cause it to light up,
then the wire connections from the GFCI outlet to the inverter are not
attached correctly, repeat Steps 3 and 4 of the installation; or,

b) Ensure the inverter is on and not in Search mode, or
c) Check the test lamp to ensure it is not faulty, or use a different test

lamp.

2 ©2012 Magnum Energy, Inc.