Cooper Metalux XHB Manuel D'installation page 3

Power Configuration
The power transformer secondary feeding the electrical distribution system must be a three-phase, four-wire wye
configuration. If any other transformer configuration is present, notify Ephesus before proceeding with installation.
Follow proper grounding methods: Electrical system must be grounded. If you are not sure if your power system is
grounded, DO NOT install the luminaire. Contact a licensed electrician for information on proper grounding methods
as required by the electrical code. FAILURE TO FOLLOW THIS WARNING MAY LEAD TO DEATH, SEVERE INJURY, OR
PROPERTY DAMAGE.
Circuit Voltage
Branch power circuits feeding luminaires shall be 277V, 347V, or 480VAC only.
Do not attempt to connect luminaires to any circuits with nominal voltage below 277V or above 480VAC. FAILURE TO
FOLLOW THIS WARNING MAY LEAD TO LUMINAIRE INTERNAL DAMAGE AND FAILURE.
The voltage on the lighting circuits must stay within 3% of nominal at 60Hz. Voltage that is consistently too high or low shall
be corrected before LED luminaires are installed.
Fusing
If individual branch circuit protection is required, Table 2 shows the minimum fuse ratings for each individually circuited
luminaire.
Installation Instructions - Extreme High Bay Installation Manual
Three Phase Four Wire Wye
277V
(or 120V, or 347V)
Figure 1. Acceptable Power Configurations
WARNING
WARNING
Circuit Voltage (VAC)
277
347
480
Table 2. Minimum Fuse Ratings
480V*
(or 280V)
277V
480V*
(or 347V)
277V
(or 120V, or 347V)
Minimum Fuse Rating (amps)
4
4
3
COOPER LIGHTING SOLUTIONS
Phase A
Phase B
Neutral
480V*
Phase C
IB507004EN Installation instructions
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