BCU Mounting and Power Wiring for International Installations
BMTW-SVN01F-EN 29
• The ac-power wiring must comply with the National Electrical Code
(NEC) and applicable local electrical codes.
• The ac-power wiring requires three-wire 120/240 Vac service. Use
copper conductors only.
CAUTION
Use Copper Conductors Only!
Unit terminals are not designed to accept other types of conductors.
Failure to use copper conductors may result in equipment damage.
Connect the AC-Power Wires
To connect the ac-power wires to the BCU:
nWARNING
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before ser-
vicing. 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.
1. Lock open the supply-power disconnect switch.
CAUTION
Avoid Equipment Damage!
Be careful when punching out the conduit knockout. Failure to do so
may cause damage to internal components.
2. At the upper left corner of the BCU, punch out either of the 22 mm
(
7
/8 in.) 120/240 Vac knockouts (see Figure 8 on page 30).
3. Access the power supply wiring by removing the BCU cover and the
block-off that covers the power supply area at the top of the BCU.
4. Set the line voltage switch to match the supply voltage (120–240 Vac).
5. For 120 Vac, connect the black wire (or other color wire that is not
white or green) to the top terminal block position (see Figure 8 on
page 30). Then connect the white wire to the middle terminal block
position.
6. For 240 Vac, connect the black wire (or other color wire that is not
white or green) to the top and middle terminal block positions.
Note:
The BCU transformer voltage utilization range is 98–132 Vac
(120 Vac, nominal) or 196–264 Vac (240 Vac, nominal). The
panel determines whether the current is 50 or 60 cycle.
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