Samlex America DC-3500-KIT - Manuel (Page 14)

14 | SAMLEX AMERICA INC.
noteS
• Current in Amperes a conductor can carry continuously under conditions of use
without exceeding its temperature rating is termed Ampacity (Ampere Capacity).
Conductor temperature rating of 105°C / 221°f, ambient temperature of 30°C / 86°f
and wiring in free air have been considered.
• Cable size is indicated in American Wire Gauge (AWG). AWG of a stranded cable
is determined by the total cross-sectional area of the conductors. Because there
are also small gaps between the strands, stranded cable with higher number of
strands will always have a slightly larger overall diameter than a solid cable / cable
with lesser number of strands with the same AWG.
• The Ampacity of the cable is equal to or greater than the DC input current at the
rated continuous output power of the recommended power range of
typical inverters.
• lengths of cable run of 3 ft. (.91 meters) / 6 ft. (1.83 meters) / 10 ft. (3.05 meters)
are the distances between the battery and the inverter. The running length of rout-
ing of the cable should be considered if the wiring run is not straight but circuitous.
• Specified AWG size of cable will produce maximum continuous voltage drop =
(DC input current at the rated continuous output power of the inverter) X
(resistance of the length of cable). length of cable is equal to 2 times the distance
(to cover the total length of the Positive and Negative cables). Table given below
indicates resistance of wire in ohm / ft. at 25°C / 77°f for calculating voltage drop.
cable
Size
Resistance in
ohms / ft.
Value of current for
calculating Voltage Drop
AWG #4 0.0002533 100A
AWG #2 0.0001593 200A
AWG #2/0 0.000077 300A
AWG #4/0 0.000050 400A
• Ampere rating of the fuse is equal to or less than the Ampacity of the cable. for
safety against overheating of the cable beyond its rated conductor temperature
and consequent possibility of fire due to damage to wire insulation, the Ampere
rating of the fuse should not exceed the Ampacity of the cable.
• These Kits are recommended for various installation requirements covering battery
to inverter distances of up to 10 ft. Depending upon the distance between the bat-
tery and the inverter, voltage drops will vary as shown
• cAution! For broader suitability, 10 ft. cables are provided with each kit to cover
distance of up to 10 ft. to prevent unnecessary voltage drop, cut off excess length
of cable that is more than the distance between the battery and inverter. For ex-
ample, if the distance is 3 ft., use only 3 ft. and cut off the balance 7 ft.
sectIOn 4 | specifications
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