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Fuse holders

Busman HKP-HH fuse holder

Busman fuse holder/ panel mount/ drill 1/2" hole

Some fuseholders accept terminal connections, some have solder-only connections. 
Fuse blocks have screw terminals.

Panel mount fuse holders at Amazon
Buy fuseholder at Amazon
Buy fuseholders at Amazon

Fuse blocks at Amazon
30 amp fuseholder at Amazon
20 amp fuseholder at Amazon
Electrical terminals
Solder guns

Yellow for 12 gauge/ Blue for 14 gauge
Must solder solid copper wire when using fuseholder or terminal. Must solder stranded wire when using fuseholder. Stranded wire can be crimped to terminal.
How to solder wire to fuseholder or to terminals. Put wire in place. Place hot tip on wire. Wait for wire to heat. Touch solder to hot wire. Solder melts. Withdraw solder. Withdraw hot tip.

Fuse holder installed in 6x6x4 box

Drill 1/2" hole for installation in 6x6x4 box.
Drilll any size hole in metal or plastic electric boxes
Buy tapered drill/ step drill bit for any size hole
Step drill bits at Amazon
Neiko tapered drill bit 1/4"-1-3/8" hole
15 Amp ceramic fuse

Busman 15 Amp ceramic fuse fits inside fuseholder

Available hardware, etc
Common for microwaves.
Generally, household circuit breakers are slow acting... and this allows amp surge of heat for starting motors such as refrigerator, pump etc. So heat is allowed to build up inside slow-acting fuses and circuit breakers before tripping.
Fast-acting fuses and circuit breakers are not same as GFCI protection.
GFCI is instanteaneous trip when short to ground is detected by ammeter inside GFCI device.
Fast and slow acting fuses wait until heat reaches fuse and then build-up of heat trips fuse.
Buy fast and slow acting fuses:
Ceramic fuses at Amazon
Fast acting ceramic fuses
surface mount fuseholder

Surface mount ANL fuseholder

e2 fuseholder with platium plating
ANL fuses

Resource information

Fuse blows when heat exceeds amp rating of fuse.
Amperage = heat
Volts x amp = watts Resource:
Electric Formulas
Formulas and terminology
See wire sizes and amp ratings

Inline Fuseholder
Larger image
Fuseholder holds fast-acting or slow acting fuse
If load rating of circuit cannot exceed strict limits, then choose fast-acting fuse.
For motor loads, slow acting fuse is better, since surge of amperage is needed to start motor.

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 all similar and programmable timers
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

Larger image

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 wire and trip the fuse. But the process is not instantaneous.
in line fuse
Larger image

125Volt 15 amp fuseholders at Amazon

Use in-line fuse when connecting 2 different gauge wires

Illustration shows how to draw 120V from 240Volt line.
Only possible by code if 240Volt line has neutral wire.
These connections must be put inside enclosed box with cover.

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
Panel mount fuse holders at Amazon
Ceramic fuses at Amazon
Fast acting ceramic fuses


Test for breaks in wire/ Test for voltage
Most appliance require 80% rated voltage to function correctly
Multimeters at Amazon
Electric testers at Amazon 
How to test and replace element
How to test thermocouple
Element tests for 120 volts
How to test wire
Safety when testing wires:
Never touch wet or previously flooded appliance.
Never stand on wet surface when working on electric.
Never stand on bare soil, put down dry boards.
Tape tester leads to wood sticks to keep hands away from power.
Use non-contact voltage tester before touching wires.
Never touch or lean into any made of metal.
Remove metal objects from pockets.
Do not use oxygen or fuel accelerants in same room as electrcial repairs

Basic house wiring

Non-contact voltage tester

Test for power without touching connectorss
NEVER assume power is OFF

Non-contact voltage tester Amazon
Electric testers at Amazon
How to test electric power is off

How to install terminals


Terminal kit
Blue for 16-14 wire
Yellow for 12-10 wire
Read about terminals
wire connector assortment

Twist-on wire connector assortments

Do not reuse old connectors 

Connector assortment at Amazon
Connector assortment at Amazon

How to select and install twist-on wire connectors
Weatherproof wire connector

Weatherproof wire connector

Connector cavity is full of silicone
Built-in cover keeps silicone in place
Protect from water, dust etc
Buy from my affiliate links
Weatherproof size 14 to 6 Amazon
Weatherproof size 22 to 8 Amazon

How to select and install twist-on wire connectors
Wire connector wrench

Wrench to apply wire connectors

Tighten connector 

Wire connector blaster
Twist connector wrenches at Amazon

How to twist wire
How to select and install twist-on wire connectors
Push on wire connectors

Push-on wire connectors in place of twist-on connectors

Push on wire connectors Amazon
Red 3P connector for 10-14 gauge wire
Lever connectors for stranded wire at Amazon
add solder to stranded wire

Turn stranded wire into solid wire

Add solder to 1" length of tightly twisted stranded wire to make into solid wire
Heat wire. Touch solder to wire. Let cool. File away over-solder.
soldering guns

Timer caught fire

linesman pliers
Buy tools:
Wire strippers at Amazon
Linesman pliers
Utility knife at Amazon
End cutting nippers at Amazon

Fire inside timer caused by stranded wire
Keep enclosure door closed at all times

Fire caused by stranded wire

Do not use stranded wire under screw plate

Applies to timers, switches, outlets, pumps etc.
Small devices, with small loads, such as lamp socket, stranded wire is fine
Add solder to 1" length of tightly twisted stranded wire to make into solid wire
Heat wire. Touch solder to wire. Let cool. File away over-solder.
soldering guns

Timer caught fire

Orange 10 gauge 30 amp

Orange/ #10 gauge for for 30 amp circuits including water heater
with ground
10-2 gauge/ 30 amp
10-3/ 30 amp

NMB is house wiring
UF is underground

Yellow 12 gauge 20 amp

Yellow/ #12 gauge wire for 20 amp
with ground
12-2 gauge/ 20 amp
12-3/ 20 amp

Rolls of stranded wire

NMB is house wiring
UF is underground
White 14 gauge 15 amp

White/ #14 gauge wire for 15 amp
with ground
14-2 gauge/ 15 amp
14-3/ 15 amp

NMB is house wiring
UF is underground

Copper ground wire
Use same size as other wire in circuit

Spools of ground wire
Ground rods at Amazon
Additional links
Electricity leaves power plant What is 3-phase electric: power plant to end user

Basic household wiring
Basic water heater circuit

Figure volts amps watts for electric water heater
Test elements
Replace elements
How to wire tankless electric
How to change water heater temperature using timer
Change water heater from 240Volt to 120Volt
Replace thermostats
How to wire thermostats
How to wire water heater for off peak operation

How to twist wire
How to wire Cooper 277 pilot light switch
How to wire combo switch-outlet
How to replace 3-speed fan switch

How to wire dimmer
How to wire 3-way dimmer
How to wire occupancy switch
How to wire motion detector
How to wire TM811 and TM8111 switches
How to wire wall timers
How to wire box timers
How to wire off-delay timer
Wire off-delay timer
How to wire pin timers

How to wire and troubleshoot photo eyes
Reverse photoeye so it turns on in day
24 Volt photoeye
24 volt programmable timer

How to wire switches
How to add switch
How to add 3-way switch

Timer for 3-way switch
Timer for 4-way switch

How to add outlet 
How to wire 3-way switches
How to wire 4-way switches

Troubleshoot Malibu outdoor lights
Select and install wire connectors
Select wire size

Electrical formulas
Electricians forum

Electrical pages

How to wire arc fault breaker
How to wire GFCI
How to wire GFCI combo

Basic water heater circuit
How to wire water heater for 120Volt
Install old work box

How to drop wire from attic
Wire connector

How to wire 240volt outlets
How to install 3-phase timer
How to wire 3-phase outlets
How to wire 3-phase surge protector
What is 3-phase

How to wire whole house surge protector
How to wire under-counter water heater

See inside main breaker box
Replace breaker
Install subpanel

How to solder wires
Whole house surge protector
3-phase surge protection
Circuit breakers

Difference between 120 volt and 240 Volt
Difference between 50Hz and 60Hz
How to install electric meter on water heater
How to wire water heater thermostat
How to wire water heater with switches and timers

6x6x4 Enclosures
Intermatic timer enclosures

Convert AC water heater to DC
How to wire DC solar water heater
DC relays for solar water heater
How to add another thermostat to water heater

How many Kwh to heat water
Chart for figuring heating time for electric heater

Intermatic control centers Intermatic control centers:
+ manuals and parts

Including Z-wave
box timers Compare box timers

Control with Z-wave
programmable timer Compare programmable timers

Control water heater with programmable wall timer
Countdown timers Compare countdown timers

Control water heater with countdown timer
Compare power packs

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