Voltage Type And Conductor Count Options; Cabling Length Options; Planning For Cable Lengths And Type - enphase M250 Installation And Operation Manual

Voltage Type and Conductor Count Options

The voltage types are either single-phase or three-phase. All Engage Cable connectors bear labels
indicating the voltage designation. Single-phase (230 Vac) Engage Cable includes three conductors.
Three-phase (400 Vac) Engage Cable includes five conductors. Because Enphase microinverters output
onto one phase, the 400 Vac Engage Cable balances the phases by rotating conductor use from one
microinverter to the next as shown on page 22.

Cabling Length Options

Engage Cabling is available in shorter lengths with 30-40 connectors, depending upon voltage type.
Longer lengths can be ordered and cut to suit per order. Cable is also available with C2 rating. Ordering
options include:
Model Number
ET10-230-40
ET10-230-40-C2
ET10-230-BULK
ET10-230-BULK-C2
ET10-400-30
ET10-400-30-C2
ET10-400-BULK
ET10-400-BULK-C2
ET17-230-40
ET17-230-40-C2
ET17-230-BULK
ET17-230-BULK-C2
ET17-400-30
ET17-400-30-C2
ET17-400-BULK
ET17-400-BULK-C2
ET21-230-192-2.5mm
ET21-400-192-2.5mm
ET21-400-192-C2-2.5mm

Planning for Cable Lengths and Type

The Cabling System is flexible enough to adapt to almost any solar design. To determine the length and
cable type that you need, apply the following considerations:

Account for the number of Enphase Microinverters to be installed on the AC branch
circuit. Make sure to allocate the correct number of connectors, including extra connectors for
gaps and turns.

Plan for additional cable length to reach from the AC branch circuit junction box to the
first microinverter. If greater than half a connector interval is needed, you may need to allow for
one (or more) unused connectors in order to span this distance. You must cover unused
connectors with Enphase watertight sealing caps.
31
Voltage/ Connector
conductors count
230 Vac, 40
3 conductors
230 Vac, 240
3 conductors
400 Vac, 30
5 conductors
400 Vac, 240
5 conductors
230 Vac, 40
3 conductors
230 Vac, 240
3 conductors
400 Vac, 30
5 conductors
400 Vac, 240
5 conductors
230 Vac, 192
3 conductors
400 Vac, 192
5 conductors
 2016 Enphase Energy. All rights reserved.
M-Series Microinverter Installation and Operation
Connector
spacing
1.025 m (40")
1.025 m (40")
1.025 m (40")
1.025 m (40")
1.7 m (67")
1.7 m (67")
1.7 m (67")
1.7 m (67")
2.11 m (83")
2.11 m (83")
PV module
orientation
Portrait
Portrait
Portrait
Portrait
Landscape
Landscape
Landscape
Landscape
Landscape
Landscape
141-00024 Rev 02b