How do you size a motor fuse?
Motors should be fused with a time-delay fuse rated 175% of the motor’s full load operating amperage, 250% of the full load operating amperage if a circuit breaker is used. The wire to a motor must be rated to carry 25% more amperage than the motor draws when operating at full load.
What are the standard fuse sizes?
Standard sizes for fuses and fixed trip circuit breakers, per 240.6, are 15, 20, 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100, 110, 125, 150, 175, 200, 225, 250, 300, 350, 400, 450, 500, 600, 700, 800, 1000, 1200, 1600, 2000, 2500, 3000, 4000 5000, and 6000 amps.
How do you size a fuse?
Find the size of fuse by multiplying the amps required by the device (2) by 1.5. 2×1.25 = 2.5 then we will round up to the nearest fuse size (in multiples of 5 amps) which would call for a 5 amp fuse. Cross Reference that fuse size to verify that it’s below the Maximum fuse size called out by this chart.
What are Fusetron fuses?
Fusetron, 225-600 amp fuses enhance safety with insulated end caps to reduce exposure to live parts and extend air gap distance between blades of adjacent mounted fuse or to housing.
What size is a 13amp fuse?
13A BS1362 Fuse | 13 Amp Plug Top Fuse Dimensions : length 25.4mm (1 inch), diameter 6.3mm (1/4 inch).
Can I use a 30 amp fuse instead of 20?
Do not use a fuse with a lower rating– don’t put a 20 amp fues in a 30 amp circuit–because it probably will blow prematurely. Conversely replacing a 20-amp fuse with one rated at 30 amps is dangerous because it may not blow soon enough and damage an electrical component or start a wiring fire.
What are FRN fuses?
The FRN-R-15 is a 15A/250VAC class-RK5 dual element Time Delay Fuse for rejection or ordinary fuse clips. This FRN-series fuse provides motor overload, ground fault and short-circuit protection. Helps protect motors against burnout from overloads.
What is the difference between FLNR and FRN fuses?
FRN-R is Cooper/Bussmann and FLNR is Littlefuse designation for the same device. TR is the Ferraz designation. This cross reference indicates they’re all the same. Awesome, thanks for the help!