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Rev. Date 090415
Fusing Chart
BRANCH CIRCUIT PROTECTION IS REQUIRED TO PROTECT THE ELECTRICAL COMPONENTS
AND COMPLY WITH UL 507.
Use the tables below to select the correct fast acting fuse size for your application.
Model 550
Max Amp Draw / Fuse Size
Voltage and Phase 8ft 10ft 12ft 14ft 16ft 18ft
110 VAC 1-Phase 9.0A / 10* 13.9A / 15* 13.9A / 15* 13.9A / 15* 15.2A / 20* 15.2A / 20*
120 VAC 1-Phase 8.3A / 10 12.7 / 15 12.7A / 15 12.7A / 15 14.0A / 15 14.0A / 15
208-240 VAC 1-Phase 4.8A / 5 7.3A / 10 7.3A / 10 7.3A / 10 8.1A / 10 8.1A / 10
277 VAC 1-Phase 3.6A / 5 5.5A / 10 5.5A / 10 5.5A / 10 6.1A / 10 6.1A / 10
208-240 VAC 3-Phase 3.4A / 5 5.3A / 10 5.3A / 10 5.3A / 10 6.6A / 10 5.8A / 10
380 VAC 3-Phase 1.9A / 5 2.9A / 5 2.9A / 5 2.9A / 5 3.6A / 5 3.2A / 5
480 VAC 3-Phase 1.5A / 5 2.3A / 5 2.3A / 5 2.3A / 5 2.9A / 5 2.5A / 5
600 VAC 3-Phase 1.2A / 5* 1.8A / 5* 1.8A / 5* 1.8A / 5* 2.3A / 5* 2.0A / 5*
Model 780
Max Amp Draw / Fuse Size
Voltage and Phase 20ft 24ft
208-240 VAC 1-Phase 12.5A / 15* 15.1A / 20*
277 VAC 1-Phase 9.4A / 10 11.3A / 15*
208-240 VAC 3-Phase 6.8A / 10 8.2A / 10
380 VAC 3-Phase 3.7A / 5 4.5A / 5
480 VAC 3-Phase 2.9A / 5 3.5A / 5
600 VAC 3-Phase 2.3A / 5* 2.8A / 5*
*Indicates ‘NOT UL LISTED’
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