Copyright © 2011, PHONO SOLAR
Page 16 of 29
WARNING! To reduce the risk of fire, do not connect to an AC load center
“circuit breaker panel” having multi-wire branch circuits connected.
CAUTION!
DO NOT CONNECT MORE THAN 10 AC MODULES TO ONE
CIRCUIT! IF YOU WISH TO INSTALL MORE THAN 10 AC MODULES,
USE SEPARATE HOME RUN CABLES FOR UP TO 10 MORE MODULES
PER CIRCUIT. REFER TO FIGURE 3.
CAUTION!
Do not exceed the amperage rating of the circuit box to which
the AC Modules are connected. Consult the National Electric Code or your
local Code Safety Inspector for the applicable rules and regulations in your
area.
Up to 10 AC modules may be connected to a single home run cable. The AC panel should
be connected only to a dedicated branch circuit. Each HelioSentry
®
is equipped with inputs
for two home run cables (LINE-1 and LINE-2). Up to 20 AC modules may be connected to
one HelioSentry
®
.
Each LINE must use separate dedicated conductors from each system to the AC disconnect
panel. At that point, each LINE AC output must have its own AC 20 ampere disconnect
breaker.
NOTE!
The combined output power of multiple inverters may not exceed the
service rating of the circuits to which the inverters are connected. Consult
ANSI/NFPA 70: The National Electrical Code for guidance.
WARNING!
These units are provided with fixed trip limits and shall not be
aggregated above 30 kW on a single Point of Common Connection.
CABLING
AC Module installation kits are provided with UL-approved, sunlight resistant, 3-conductor
cable for connection purposes to utility power. This cable is rated for exterior use without
conduit. Do not substitute Romex
®
or any other conductor for this cable.
Cable lengths in Table 3 give less than 5% voltage drop for runs of up to 150 feet for various
numbers of AC Modules. If longer distances are involved, increase conductor gauge and/or
decrease in the number of AC Modules per conductor as required. Consult the National
Electric Code or other authoritative sources for appropriate wire size for your installation.
Table 3
– Cable Lengths
Cable Length up to 100‟: Max of 10 AC Modules connected in parallel.
Cable Length 100‟ to 125‟: Max 8 AC Modules connected in parallel.
Cable Length 125‟ to 150‟: Max 6 AC Modules connected in parallel.
