Class J fuses are commonly used in branch circuits, motor circuits, mains, feeders, control panels, electronic motor controllers, drives, soft-starters, circuit breaker back-up, transformers, load centers, lighting, heating and general loads to name a few.
Are Class J fuses current limiting?
A Class J fuse is a 600 volt AC current limiting, fuse that is rated to interrupt a minimum of 200,000 amps. Bussmann, Littelfuse and Mersen self-certify their Class J fuses to a 300,000 interrupting rating,. Ampere ratings for the J type fuses range from 1 to 600 amps.
What fuse rating should I use?
If it’s a rewireable type plug and the original fuse size fitted by the manufacturer is not known, the recommended method is to use the 700W rule: For an appliance rated as 700W or less, a 3A fuse should be fitted. For appliances above 700W, a 13A fuse should be fitted.
What is the difference between Class R and Class J fuses?
Class R fuses are available with DC ratings. They have an interrupting rating of 200kA rms symmetrical and are separated into two separate classes, RK1 and RK5. Current ratings of UL Class J fuses range from 0A to 600A, and the voltage rating is 600VAC. Class J fuses are available with DC ratings.
What does RK1 mean?
What is a Class RK1 Fuse,? The UL Class RK1 fuse is current limiting, fuse that is rated to interrupt a minimum of 200,000 amps. The RK1 fuse is rated at either 250 volts AC or 600 volts AC and is available in fast acting, or time delay versions. The RK1 fuse has ampere ratings range from 1/10 to 600 amps.
How many watts can a 13 amp fuse take?
3000 watts
Plugs for appliances rated between about 700 watts and 3000 watts (the maximum rating of a wall socket) should be fitted with a 13-amp fuse (coloured brown). For example: 13A Fuse – Washing machine, dishwasher, microwave, kettle, toaster, iron.
What size ANL fuse do I need?
ANL type fuses are the most common types of fuses used to protect the main power wire in car audio systems. ANL fuses are available from Bussmann in sizes from 35 amps to 750 amps….
| Wire Gauge | Recommended Maximum Fuse Size |
|---|---|
| 4 awg | 125 amps |
| 6 awg | 80 amps |
| 8 awg | 50 amps |
| 10 awg | 30 amps |
What is a class RK5 fuse?
A UL Class RK5 fuse is a current limiting, time delay fuse, that is rated to interrupt a minimum of 200,000 amps. The UL Class RK5 fuse is less expensive but less current limiting than the Class RK1 fuse,. It has a dual element, construction. RK5 fuses are rated at either 250 or 600 volts AC.
What are low peak fuses?
Low-Peak fuses help reduce fault currents to meet new assembly Short-Circuit Current Rating (SCCR) requirements for equipment installations. And selective coordination is easy with a 2:1 amp ratio between upstream and downstream fuses.All with less inventory and cost.
What is the current rating of a Class J Fuse?
Class J fuses. These non-renewable fuses are current-limiting and conform to 248-8. Current ratings of UL Class J fuses range from 0A to 600A, and the voltage rating is 600VAC. Class J fuses are available with DC ratings.
What is the interrupting rating of a CC fuse?
The interrupting rating is 200kA rms symmetrical. Class CC fuses must be labeled “Current Limiting,” and may be labeled “Time Delay.”. The optional time-delay test requirements for this class of fuses (a minimum 12-sec opening time at 200% fuse current rating) is different than that of other larger body fuses.
What is the difference between Class K and time delay fuses?
Time-delay labeling is available if the fuse meets the UL optional time-delay test requirements of a minimum 10-sec opening time at 500% of fuse current rating. Class K fuses. These non-renewable fuses are available in 250VAC and 600VAC ratings, with current ratings from 0A to 600A. Class K fuses are available with DC ratings.
What is the difference between cc and G fuses?
Class CC fuses must be labeled “Current Limiting,” and may be labeled “Time Delay.” The optional time-delay test requirements for this class of fuses (a minimum 12-sec opening time at 200% fuse current rating) is different than that of other larger body fuses. Class G fuses.
