31. WIRING COMPARTMENT
The wiring terminals and compartment of the FLEXmax 80 Charge Controller are fully compliant with all NEC and UL requirements. The following summary is specific for North American applications where NEC and UL standards govern installations.
Recommended Conductor and Breaker Sizes for the FLEXmax 80
Output Rating at 80 amps
If the output current of the Flexmax 80 is expected to reach the maximum output level of 80 amps:
• #3 or #2 AWG conductor must be used with an 80 amp breaker (100% continuous duty rated breaker)
• The minimum recommended battery conductor is #3* AWG |
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METRIC | |
• The maximum recommended battery conductor is #2** AWG | #4…21.15mm2 |
| #3…26.7mm2 |
| #2…33.6mm2 |
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*#3 AWG conductor can be installed through the side, back or bottom knockouts
**#2 AWG conductor must be installed on the side or back knockout to meet the specific UL requirements for wire bending room standards
-1” conduit knockout is approved for up to three #2 AWG conductors
-For short conduit runs (less than 24”), a higher conduit fill is acceptable*
Please reference the NEC Appendix “C” in the back of the book. You must refer to the table representing the type of conduit you will be using to find the maximum number of conductors allowed within the conduit you will be using.
Output Rating less than 64 amps
If the output current of the FLEXmax 80 is expected to be less than 64 amps:
•An 80 amp breaker and #4 AWG conductors can be used on the battery side.
•The PV array short circuit current must be less than 48 amps and the #4 conductor will be acceptable with an 80 amp breaker.
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