Lennox SunSource, Инструкции по установке

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Page 6
B2 — Wire Calculations
AC Wire Sizing
Description
AC run from inverter through ACV disconnect to solar source
breaker.
1. Design Current
S
Microinverter Maximum Current 15 A AC Maximum Current 15 A AC
2. Wire Size
S
Maximum average ambient
temperature
115°F (46°C)
Temperature De-rate
Factor
0.87
S
Number of current wires 2 per conduit
Conduit de-rate
factor
1
S
Maximum wire temperature allowed
167°F (75°C)
S
Selected wire size
10 AWG
S
Insulation type
THHN/THWNN-2
Specified wire
ampacity
30.45 amps
3. Conduit size
S
Conduit specified ¾”
S
Conduit type
EMT
4. Breaker size
S
AC over-current protection device
(OCPD) size specified
20 A AC
Minimum breaker
size
20 A AC
S
Voltage rating of OCPD
240 VAC
Maximum breaker
size
30
5. Voltage drop
S
Vnom 240 VAC Voltage drop .96 VAC
S
Inom 12.0 A AC
Voltage loss percent­
age
0.4%
S
Wire distance
45 feet (13.7 meters) Power loss 11 watts