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MNE-240 E-PANEL INSTRUCTIONS
3.4 Installing Optional Hardware
Additional Breakers
Additional AC circuit breakers can be installed per the manufacturer’s instructions on the open DIN
Rail in the E-Panel. This DIN Rail has locations available for six additional 13mm wide AC and DC
circuit breakers. These additional circuit breakers can be used for such things as: solar, wind or
hydro charge controllers, DC ground fault protector, AC and/or DC distribution center and more.
Info:
MidNite offers 150VDC breakers in 1, 6, 7, 8, 10, 12, 15, 20, 30, 50 and 63 amps.
AC breakers are available in 10, 15 and 20 amp sizes that carry the UL489 and UL489A
branch circuit rating. MidNite also offers 30, 50 and 60 amp sizes that carry the UL1077
listing for supplementary protection but are not branch circuit rated; these breakers are
rated for continuous duty and are usually used as AC disconnects.
To install additional breakers, remove the side breaker cover with the circuit-breaker cut-outs;
see figure 4. Each 13mm wide breaker requires removal of two cut-outs and the 17.5mm wide
breakers require removal of three cut-outs.
Caution:
Torque the breaker terminals to 20 in. lbs. using a 1/4” wide flat-blade screwdriver
(do not use a 3/16” wide or Phillips screwdriver, they can damage the screw terminals
easily). It is highly recommended to recheck all terminations after an hour and also conduct
a pull test. You may be surprised that what you thought was a tight connection actually
pulls out with little effort. Copper is a relatively soft metal and will continue to move under
inadequate clamping pressure; a 20 inch pound of torque takes a lot of strength!
When installing DC and AC breakers together on the same din rail. Some local inspectors will
require physical separation between the AC and DC breakers. There are UL listed plastic 2” x 6”
insulators supplied with this E-Panel to fulfill this separation requirements; see figure 5.
Info:
UL and the NEC allow mixing AC and DC wiring in this installation because the wire
insulation is rated for the highest voltage encountered in the enclosure. Both AC and DC
circuits are considered part of the same Renewable Energy circuit for this installation.
2 x 6" insulators
(placed between the
din-rail mounted DC
and AC breakers)
Figure 4, Removing and replacing
the breaker cover
Charge Controller Bracket
Figure 5, Insulators between AC and DC
breakers
If installing a Charge Controller, secure the charge control bracket to the E-Panel with two #10 x
3/8” sheet metal screws supplied.
Inverter Remote Bracket
If installing the inverter remote control, secure the remote bracket to the upper left hand side
of the E-Panel with two #10 x 3/8” sheet metal screws supplied. When installing the bracket on
the right side, use two sheet metal screws and one machine screw. The remote bracket hides the
space of the AC outlet cut out, but the outlet still can be used with the bracket installed.
