Manual

9
7.2 INPUT FUSING AND DISCONNECT REQUIREMENTS
A circuit breaker or a disconnect switch with fuses must be provided in accordance with the National
Electric Code (NEC) and all local codes. Refer to the following tables for proper fuse/circuit breaker
ratings and wire sizes.
FUSE, CIRCUIT BREAKER, AND WIRE SIZES (for installation to UL and EN 60204-1)
NOTE 1: Use UL Class CC fast-acting, current limiting type fuses. Select fuses with low 1
2
T
values, rated at 200,000 AIC. Recommended fuses are Bussman KTK-R, JJN, and JJS. Similar fuses
with equivalent ratings by other manufacturers may also be acceptable.
NOTE 2: When using a pulse-current or universal-current sensitive ELCB (earth leakage circuit
breaker), the detection level must be rated 30mA or greater. Observe the following when using
ELCBs:
1. Only install the ELCB between the supply mains and drive controller.
2. The ELCB can be activated by:
- capacitive leakage currents between the cable screens during operation
(especially with long, screened motor cables)
- connecting several drives to the mains at the same time
- additional RFI filters
INPUT FUSE & CIRCUIT BREAKER RATINGS
120 Vac 1 phase 208/240 Vac 1 phase 208/240 Vac 3 phase 400/480 Vac 3 phase
174263 10A 174267 10A
174264 15A 174268 10A 174274 10A 174281 10A
174265 25A 174270 15A 174276 10A 174282 10A
174266 35A 174271 20A 174277 12/10A 174283 10A
174272 25/20A 174278 15/12A 174284 10A
174273 30/25A 174279 20/15A 174286 10A
174288 30/25A 174287 15/12A
174280 45/40A 174285 20/20A
174290 50/50A 174291 30/25A
174292 80/75A 174293 40/35A
INPUT WIRE SIZE REQUIREMENTS
120 Vac 1 phase 208/240 Vac 1 phase 208/240 Vac 3 phase 400/480 Vac 3 phase
MODEL AWG mm
2
MODEL AWG mm
2
MODEL AWG mm
2
MODEL AWG mm
2
174263 14 1.5 174267 14 1.5
174264 14 2.5 174268 14 1.5 174274 14 1.5 174281 14 1.5
174265 12 4.0 174270 14 2.5 174276 14 1.5 174282 14 1.5
174266 10 4.0 174271 14 2.5 174277 14 1.5 174283 14 1.5
174272 12 4.0 174278 14 2.5 174284 14 1.5
174273 10 4.0 174279 14 2.5 174286 14 1.5
174288 12 4.0 174287 14 2.5
174280 8 6.0 174285 12 2.5
174290 8 10 174291 10 4.0
174292 8 16 174293 8 6.0