240-MC4 - User Manual

Installation and Operation Manual

Chilicon Power | Aug 2016

CABLE MAXIMUMS

The maximum size current protection device allowed by NEC code for use with 12AWG wire in

the trunk cable is 20A. This leads to the following calculations for the maximum number of

allowed inverters per trunk cable.

A. Maximum number of inverters on a 20 amp, 240V circuit:

250W output mode: (20A/(1.04*1.25)) = 15

285W output mode: (20A/(1.18*1.25)) = 13 (if 285W enabled by gateway)

B. Maximum number of inverters on a 20 amp, 208V circuit:

250W output mode: (20A/(1.20*1.25)) = 13

285W output mode: (20A/(1.37*1.25)) = 11 (if 285W enabled by gateway)

C. Portrait Mode Installations In portrait mode installations, the maximum supplied trunk

cable length (15 taps) is 15.5m = 51’.

D. Landscape Mode Installations In landscape format installations, the maximum supplied

trunk cable length (15 taps) is 25.5m = 84’