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OM-926 Page 13
4-7. Electrical Service Guide
50/60 Hz Single Phase
Input Voltage 208 230
Input Amperes At Rated Output 33 30
Max Recommended Standard Fuse Rating In Amperes
Cricuit Breaker
1
, Time-Delay
2
40 35
Normal Operating
3
50 45
Min Input Conductor Size In AWG
4
10 10
Max Recommended Input Conductor Length In Feet (Meters)
80
(24)
98
(30)
Min Grounding Conductor Size In AWG
4
10 10
Reference: 2005 National Electrical Code (NEC) (including article 630)
1 Choose a circuit breaker with time-current curves comparable to a Time Delay Fuse.
2 “Time-Delay” fuses are UL class “RK5” .
3 “Normal Operating” (general purpose - no intentional delay) fuses are UL class “K5” (up to and including 60 amp), and UL class “H” ( 65 amp and
above).
4 Conductor data in this section specifies conductor size (excluding flexible cord or cable) between the panelboard and the equipment per NEC Table
310.16. If a flexible cord or cable is used, minimum conductor size may increase. See NEC Table 400.5(A) for flexible cord and cable requirements.
Y Caution: Failure to follow these fuse and circuit breaker recommendations could create an electric shock or fire hazard.
4-8. Extension Cord Data
When calculating max. cord length, remember to include conductor length from
line disconnect device to input power receptacle.
NOTE
Input Voltage
Input Power
Phase
Hertz
Fuse Size Or
Circuit Breaker Rating
Conductor Size Max. Cord Length
208 V 1 50/60
Time-Delay
2
40 A
Normal Operating
3
50 A
10 AWG 80 ft (24 m)
230 V 1 50/60
Time-Delay
2
35 A
Normal Operating
3
45 A
10 AWG 98 ft (30 m)
2 “Time-Delay” fuses are UL class “RK5” .
3 “Normal Operating” (general purpose − no intentional delay) fuses are UL class “K5” (up to and including 60 amp), and UL class “H” ( 65 amp and
above).