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46 SS-SVX09A-EN
Installation
Main Unit Power Wiring
ƽ WARNING
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow proper
lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to
disconnect power before servicing could result in death or serious injury.
Table 7 lists the field connection wire ranges for both the main power terminal block 1TB1 and the
optional main power disconnect switch 1S1. The unit electrical data is listed in Table 8. The
electrical service must be protected from over current and short circuit conditions in accordance
with NEC requirements. Protection devices must be sized according to the electrical data on the
nameplate. Refer to the “Power Wire Sizing & Protection Device Equations”, for determining;
a. the appropriate electrical service wire size based on “Minimum Circuit Ampacity” (MCA),
b. the “Maximum Over current Protection” (MOP) device.
c. the “Recommended Dual Element fuse size” (RDE).
1. If the unit is not equipped with an optional factory installed nonfused disconnect switch, a field
supplied disconnect switch must be installed at or near the unit in accordance with the National
Electrical Code (NEC latest edition). Refer to the “Power Wire Sizing & Protection Device
Equations” (DSS calculation), for determining the correct size.
2. Complete the unit’s power wiring connections onto either the main terminal block 1TB1, or the
factory mounted nonfused disconnect switch 1S1, inside the unit control panel. Refer to the
customer connection diagram that shipped with the unit for specific termination points.
3. Provide proper grounding for the unit in accordance with local and national codes.