Voltage Type And Conductor Count Options; Cabling Length Options; Planning For Cable Lengths And Type - enphase M215-60-2LL-S25-IG Manual

Voltage Type and Conductor Count Options

The voltage types are either 240 VAC split phase or 208 VAC three phase. All cable connectors bear
labels indicating their cable voltage designation. Typically used for residential applications, 240VAC
includes four conductors. Three-phase 208 VAC cabling includes five conductors, and is used for most
commercial installations. Because Enphase microinverters output onto two phases, three phase cabling
balances the phases by rotating conductor use from one microinverter to the next as shown on page 17.

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. Ordering options include:
Model Number Voltage type/
conductor #
240 VAC,
ET10-240-40
4 conductor
240 VAC,
ET17-240-40
4 conductor
208 VAC,
ET10-208-30
5 conductor
208 VAC, 5
ET17-208-30
conductor
240 VAC,
ET10-240-BULK
4 conductor
240 VAC,
ET17-240-BULK
4 conductor
208 VAC,
ET10-208-BULK
5 conductor
208 VAC,
ET17-208-BULK
5 conductor

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, take into account the following considerations:

The number of Enphase Microinverters to be installed on the AC branch circuit. Be certain
to allocate the correct number of connectors, including extra connectors for gaps and turns.

Additional length required to reach from the AC branch circuit junction box to the first
microinverter. If greater than half a connector interval is needed, it may be necessary to allow
for one (or more) unused connectors in order to span this distance. Unused connectors must be
covered with Enphase watertight sealing caps.

Plan to minimize the number of unused connectors with three-phase systems. When cable
connectors are left unused on a three-phase system, it creates a phase imbalance on the branch
circuit. If multiple cable connectors are skipped over multiple branch circuits, the imbalance can
multiply.
27
Connector Connector
count spacing
1.025 m (40")
40
1.7 m (67")
40
1.025 m (40")
30
1.7 m (67")
30
1.025 m (40")
240
1.7 m (67")
240
1.025 m (40")
240
1.7 m (67")
240
 2013 Enphase Energy Inc.
M250 Installation and Operation
PV module Approx. weight
orientation
Portrait 18.1 kg
(40 lbs)
Landscape 20.4 kg
(45 lbs)
Portrait 13.6 kg
(30 lbs)
Landscape 15.9 kg
(35 lbs)
Portrait over 90 kg
(200 lbs)
Landscape over 90 kg
(200 lbs)
Portrait over 90 kg
(200 lbs)
Landscape over 90 kg
(200 lbs)
141-00022 Rev 01