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Other models have solder-only connections.
Drill 1/2" hole for installation in 6x6x4 box.
Also available at electric supply or internet.
Bussman fuse holder |
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gather materials Do it yourself Home |
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Busman HKP-HH
fuse holder has terminal -or- solder connections. Buy
Grainger item 1CV90. Other models have solder-only connections. Drill 1/2" hole for installation in 6x6x4 box. Also available at electric supply or internet. |
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 Fuse holder installed in 6x6x4 box |
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Busman 15 Amp
ceramic fuse fits inside fuseholder. Common for microwaves. Cheapest at hardware store, home center, electric supply. |
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Fuseholder
holds fast-acting or slow acting fuse If load rating of circuit cannot exceed strict limits, then choose fast-acting fuse. Fuse protects all wires in the circuit Hot wire from breaker is also protected by fuse Timer shown is GE 15070 in-wall analog timer Timer require Neutral wire to operate analog timer dial When using ordinary switch, the white neutral wire does not connect to switch as illustrated See timer How to wire timers How to set analog timers Illustration shows contactor Contactors can control heavy Loads like water heater, motors, etc. Magnetic Coil is activated by timer or switch. Coil pulls down on contact points. When coil is deactivated, a spring pushes contact points apart. Contact points open and close circuit. See contactors |
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Use
fuseholder to tap smaller gauge wire into larger wire. Fuse is not same as GFCI. Both fuse and GFCI react to a short. GFCI will trip instantly when short to ground is detected. The action is instantaneous, and will save a life when power suddenly flows to ground. Fuse is different. Fuse reacts to buildup of heat. Open short will cause massive flow of amperage that will heat the fuse and trip the fuse. But the process is not instantaneous. |
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Use
in-line fuse when connecting 2 different gauge wires Connect 12 gauge wire to 10 gauge wire. Illustration shows smaller 12 gauge wire connected to larger 10 gauge wire. 10 gauge wire is protected by 30 amp breaker The amp draw on 30 amp breaker is too large for 12 gauge wire. 12 gauge wire should have 20 amp breaker. Use busman fuseholder with 20 amp fuse. Fuse will protect entire length of 12 gauge wire. Connect fuse to Hot wire. Not necessary to put fuse on Neutral If the 12 gauge wire was wired for 240V, then fuse is necessary for both hot wires. Always make connections inside a box with cover See wire sizes |
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