[100,000] [200,000] amperes.
Fuse holders shall be the type that will
reject Class H fuses.
a.
Class [G] [J] [L] [CC] fuses shall conform to UL 198C.
b.
Class K fuses shall conform to UL 198D.
c.
Class R fuses shall conform to UL 198E.
d.
Class T fuses shall conform to UL 198H.
2.5.3.1
Continuous Current Ratings (600 amperes and smaller)
**************************************************************************
NOTE: Class J or RK1 provide best protection for
services and feeders rated 600 amperes or less.
Class RK5 may be more cost effective where the
greater current limitation of RK1 or J is not a
requirement.
**************************************************************************
Service entrance and feeder circuit fuses (600 amperes and smaller) shall
be Class [RK1] [RK5] [J], current-limiting, [nontime-delay] [time-delay]
with 200,000 amperes interrupting capacity.
2.5.3.2
Continuous Current Ratings (greater than 600 amperes)
Service entrance and feeder circuit fuses (greater than 600 amperes) shall
be Class L, current-limiting, [nontime-delay] [time-delay] with 200,000
amperes interrupting capacity.
2.5.3.3
Motor and Transformer Circuit Fuses
Motor, motor controller, transformer, and inductive circuit fuses shall be
Class RK1 or RK5, current-limiting, time-delay with 200,000 amperes
interrupting capacity.
2.6
MEDIUM-VOLTAGE AND HIGH-VOLTAGE FUSES
2.6.1
General
Medium-voltage and high-voltage fuses shall conform to NEMA SG 2 and shall
be distribution fuse cutouts or power fuses, E-rated, C-rated, or R-rated
current-limiting fuses as shown.
2.6.2
Construction
Units shall be suitable for [outdoor] [indoor] use. Fuses shall have
integral blown-fuse indicators. All ratings shall be clearly visible.
2.6.3
Ratings
**************************************************************************
NOTE: Select fuse ratings to suit project
conditions and delete all others.
**************************************************************************
Voltage ratings shall be not less than the applicable circuit voltage.
Continuous-current ratings shall be as shown.
SECTION 16475A
Page 14
Previous Page
