Samlex Power PST-600-12 Manuel Du Propriétaire page 36

Section 8 |
NOTES FOR TABLE 8.2
1) Column 2 indicates the rated continuous DC input current drawn from the battery.
2) C olumn 3 indicates minimum NEC Ampacity for sizing of conductors. NEC Ampacity
is not less than 125% of the rated continuous DC input current (Column 2) - Refer to
NEC-2014 (National Electrical Code) - Section 215.2(A)(1)(a) for Feeder Circuits.
3) C olumn (4) indicates the size of external fuse in the battery circuit. It is mandatory to
install this fuse within 7" of the battery Positive terminal to protect the battery cables
against short circuit. Amp rating of the fuse is based on the following considerations:
a) Not less than the Maximum Continuous DC Input Current (Column 2)
b) Closest Standard Ampere Rating of fuse has been used - Refer to NEC-2014
(National Electrical Code) - Section 240.6(A)
c) Where Standard fuse Rating does not match the required Ampacity (Col-
umn 2), the next higher Standard Rating of the fuse has been used - Refer to
NEC-2014 (National Electrical Code) - Section 240.4(B)
d) Type of fuse: Fast-acting, Current Limiting, UL Class T (UL Standard 248-15)
or equivalent
4) C olumns 5 to 7 indicate minimum cable conductor size that is based on the following
2 considerations. Thicker conductor out of the following 2 considerations has been
chosen:
a) A s per guidelines in ISO 10133 for 105°C cable insulation and cable running in free
air. Conductor size is based on:
(i) NEC Ampacity specifi ed at Column 3,
(ii) Copper conductor with temperature rating of 105˚C/221˚F and
(iii) Ambient temperature of 30°C / 86°F b)
b) Voltage drop across the length of cables limited to 2% of 12V / 24V.
i) V oltage drop has been calculated by multiplying the Rated DC Input Current
(Column 2) and the resistance of the total length of Copper conductor (the
total length of conductor has been taken as 2 times the running distance
between the unit and the battery to cover 2 lengths of Positive and Negative
cable conductors).
ii) Resistance of the cable is based on Table 8.1.
5) S amlex America, Inc. makes 4 Models of generic / universal Inverter Installation Kits to cov-
er installation requirements of a wide power range from 600W to 3500W for 12V invert-
ers and from 1200W to 7000W for 24V inverters. Please note that the Inverter Installation
Kit that has been recommended in Column (8) may include thicker wire size / correspond-
ingly bigger fuse size than those recommended in Table 8.2. This is acceptable.
fuse in the battery circuit is primarily required for protection against short circuit in
the battery cable run. The size of this fuse has to be equal to or larger than the maxi-
mum DC input current of the inverter at Column (2). Further, the Amp rating of the
fuse used for protecting a battery cable against short circuit has to be lower than the
36 | SAMLEX AMERICA INC.
installation