22 | 2.0 Installation
2.5.2 AC Input/Output Hardwire Installation
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CAUTION
This installation must be performed by electrical personnel and wired in accordance with local/national electrical codes.
Installation Considerations:
On start-up, the UPS will take a half cycle inrush current of up to three times the rated current. This must be taken into
account when selecting the overload protection device at the input utility supply distribution point. To avoid random
tripping on startup, we recommend that input utility supply be protected with a MCB (Mechanical Circuit Breaker)
capable of withstanding this initial inrush.
The utility 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
specications.
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 Specications
Model VA Input Current Rating
Recommended
External Overcurrent
Protection
Recommended Wire
(105°C Copper Wire)
Maximum Wire
Accepted by
Terminal Block
Terminal Tightening
Torque
700 VA 5.9 A 15 A 14 AWG 8 AWG 20 in.-lb.
1000 VA 8.3 A 15 A 14 AWG 8 AWG 20 in.-lb.
1500 VA 12.0 A 15 A 14 AWG 8 AWG 20 in.-lb.
2000 VA 16.0 A 20 A 12 AWG 8 AWG 20 in.-lb.
3000 VA 24.0 A 30 A 10 AWG 8 AWG 20 in.-lb.
NOTES:
• Make sure the UPS is turned o 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 and/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 hard-
wired; Safety/EMC certication requires that the supplied battery cable be used.
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