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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.

Buy:
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

Resources:
Terminals/
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
Buy:
e2 fuseholder with platium plating
ANL fuses
Din rail fuseholder

Buy:
10x38mm fuseholders
10 x 38 mm fuse

14x51mm fuseholder
14 x 51mm fuse


Dec 2015
Resource information
Fuse blows when heat exceeds amp rating of fuse.
Amperage = heat
Volts x amp = watts Resource:
Resources:
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
Buy:
Contactor
Buy fuseholder at Amazon
Buy fuseholders at Amazon
Resources:
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.
Resources:
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.

Buy:
Contactor
Buy fuseholder at Amazon
Buy fuseholders at Amazon
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
Resources:
See wire sizes
Buy:
Panel mount fuse holders at Amazon
Ceramic fuses at Amazon
Fast acting ceramic fuses


Multimeter
Test for breaks in wire/ Test for voltage
Most appliance require 80% rated voltage to function correctly
Buy:
Multimeters at Amazon
Electric testers at Amazon 
Resource:
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

Resource:
Basic house wiring

Non-contact voltage tester
Test for power without touching connectorss
NEVER assume power is OFF
Buy:

Non-contact voltage tester Amazon
Electric testers at Amazon 
Resource:
How to test electric power is off
wire connector assortment
Twist-on wire connector assortments
Do not reuse old connectors 
Buy

Connector assortment at Amazon
Connector assortment at Amazon

Resource
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

Resource
How to select and install twist-on wire connectors
Wire connector wrench
Wrench to apply wire connectors
Tighten connector 
Buy

Wire connector blaster
Twist connector wrenches at Amazon

Resources:
How to twist wire
How to select and install twist-on wire connectors

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
Treminals
Terminals
Buy:
Terminal kit
Blue for 16-14 wire
Yellow for 12-10 wire
Read about terminals

Resource:
How to install terminals
Push on wire connectors
Push-on wire connectors in place of twist-on connectors
Buy:
Push on wire connectors Amazon
Red 3P connector for 10-14 gauge wire
Lever connectors for stranded wire at Amazon

30 amp breaker use 10 gauge /


Buy:
10-2 gauge/ 30 amp
10-3/ 30 amp
Southwire electric tools
Yellow 12 gauge 20 amp


Yellow/ #12 gauge wire for 20 amp
with ground
Buy:
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
Buy:
14-2 gauge/ 15 amp
14-3/ 15 amp

NMB is house wiring
UF is underground
50-60 amp breaker use 6 gauge /
6-2 wire
Buy:
6-2 wire
Southwire electric tools
NMB is house wiring
UF is underground
40-50 amp breaker use 8 gauge /
6-2 wire
Buy:
8-2 wire
Southwire electric tools
NMB is house wiring
UF is underground

Copper ground wire
Use same size as other wire in circuit

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


Support the economy:
Buy water heaters  from my associate links:

50 gallon Gas water heaters at Amazon
40 gallon gas water heaters at Amazon
50 gallon Electric water heaters at Amazon
40 gallon electric water heaters at Amazon
Hybrid / heat pump/ water heaters at Amazon

Resources:
How to install gas water heater
How to install electric water heater
Troubleshoot gas water heater
Troubleshoot electric water heater
Point of use water heaters
Resources:
Troubleshoot Gas valves with manuals
Icon gas valve

How to replace water heater element Waste King disposal
How to wire tankless electric


Install point of use water heater
Titan tankless

Contactors/ relays
Install and troubleshoot garbage disposal Waste King disposal
Programmable timers

Woods timers
surge protection
Anode rods anode rods
Recirculation system

Tankless recirculation
Point of use water heater
Type 1 and type 2 surge protection surge protection
Gas and electric water heaters Buy
Industrial electric

Industrial supplies

Tools and home improvement

Home and garden

Hayward pool
Pentair pool

Southwire electric
Buy Tools
DEWALT
Black and Decker
Stanley
SKIL
Makita
Porter-Cable
Bosch

Irwin Hand tools
Klein hand tools
Fluke electrical testing
Dremel hobby tools

Campbell Hausfeld air powered
Tekton automotive
Powerbuilt automotive
Saws and saw blades
box timers Resource:
Compare box timers
DPDT timers
Intermatic
Control water heater w/ Z-wave
Intermatic control centers Resource:
Intermatic control centers: and parts
Digital control centers and parts
Tork control centers and parts
Subpanels
All control centers and parts
programmable timer Resource:
Programmable timers
Countdown timers
Off delay timers
On delay timers
Timer modules
Din rail
Twin & one-shot
Woods
Intermatic
Tork
Low voltage power packs Recirculation systems
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