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| 2.0 Installation
2.5.2 Ac Input/Output Hardwire Installation
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CAUTION
This installation must be performed by competent electrical personnel and wired in accordance with local and
national electrical codes.
Installation Considerations:
On start-up, the UPS will take a half cycle inrush current of up to 3 times the rated current. This must be taken into
account when selecting the overload protection device at the input mains supply distribution point. To avoid random
tripping on startup, we recommend that the input mains supply be protected with a MCB (Mechanical Circuit Breaker)
capable of withstanding this initial inrush.
The mains input supply cable must be connected to the UPS via a wall mounted double pole circuit breaker. The UPS
output port must also be protected with a double pole circuit breaker connected to the load, rated to carry the input
current, and be capable of breaking the maximum prospective short circuit current of this branch circuit. The breakers
are to be mounted within six feet of the UPS and be readily accessible to the operator. Please refer to Table 3 for breaker
specifications.
High quality ground (earth) connections are required for the equipment ground conductors (protective earth) and
grounding electrode conductor (power system earth connection) to reduce electrical noise and provide for safe opera-
tion of the UPS and connected loads. Conduit used alone without a grounding conductor wire is not an acceptable
connection. Size ground (protective earth) conductors equal to circuit conductors. For wiring information, please refer to
Table 3.
Table 3: Overcurrent Protection & Wiring Specifications
Model VA
Input Current Rating
Recommended
External Overcurrent
Protection
Recommended Wire
(105°C Copper Wire)
Maximum Wire
Accepted by
Terminal Block
Terminal Tightening
Torque
1000 VA
4.2 A
10 A
16 AWG/1.31 mm
2
8 AWG/8.36 mm
2
20 in.-lb./2.25 N-m
2000 VA
8.7 A
16 A
14 AWG/2.08 mm
2
8 AWG/8.36 mm
2
20 in.-lb./2.25 N-m
3000 VA
13.0 A
16 A
14 AWG/2.08 mm
2
8 AWG/8.36 mm
2
20 in.-lb./2.25 N-m
NOTES:
•
Make sure the UPS is turned off and unplugged before removing the original cord/receptacle board. To install the
cable box, the original cord/receptacle board must be removed and disconnected from the terminal block.
•
The cable sizes and distribution methods used during installation are subject to local/national electrical codes of
practice, and therefore are not detailed here. Table 3 details the standard current ratings. The UPS rating plate gives
details of the current ratings for alternative output voltages.
•
When choosing the input and output cables, users should strictly adhere to Table 3 for cable dimensions. Failure to
observe Table 3 could result in personnel injury or damage to the UPS.
•
When installing the cable box, make sure that the input and output cables do not interfere with the position the
UPS or external battery connectors.
•
User needs to supply hardware for securing input and output cables.
•
Section 2.5.3 describes the connection of optional external batteries. Dc battery connections may not be hardwired.
Safety/EMC certification requires that the supplied battery cable be used.
