How to wire timers
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| Use only 600 volt wire. Lamp cord, extension cords are not rated 600 volt. Use copper wire only. Aluminum wire is fire risk and should be avoided or installed by professional. 30 amp breaker use 10 gauge / 120-240 volt 30 amp outlet can be installed on 30 amp breaker only/ use 10 gauge wire ... cannot be connected to 15-20-40 amp breaker.  Orange/ #10 gauge wire, with ground ... 30 amp capacity. Safe maximum: 30 x 80% = 24 amps. Buy: 10-2 gauge/ 30 amp 10-3/ 30 amp Southwire electric tools |
Yellow
12 gauge 20 amp 120 volt 20 amp outlet can be installed on 20 amp breaker, but not 15 amp breaker/ use 12 ga wire. ... cannot be connected to 30-40 amp breaker. 1  Yellow/ #12 gauge wire, with ground ... 20 amp capacity. Safe maximum 16 amps. Buy: 12-2 gauge/ 20 amp 12-3/ 20 amp NMB is house wiring UF is underground Rolls of stranded wire HOOK UP Wires |
White
14 gauge 15 amp 120 volt 15 amp outlet, AFCI, GFCI, timer, switch etc can be installed on 15 or 20 amp breaker. Never connect 15 gauge wire to 20-30-40 amp breaker.  White/ #14 gauge wire, with ground ... 15 amp capacity. Safe maximum 12 amps. Buy: 14-2 gauge/ 15 amp 14-3/ 15 amp NMB is house wiring UF is underground |
| 50-60
amp breaker use 6 gauge / 240 volt 50 outlet can be installed on 50 amp breaker only  Buy: 6-2 wire Southwire electric tools NMB is house wiring UF is underground |
40-50
amp breaker use 8 gauge / 240 volt 40 amp outlet can be installed on 40 or 50 amp breaker only  Buy: 8-2 wire Southwire electric tools NMB is house wiring UF is underground |
  Copper ground wire. Every device, load, metal enclosure etc must be grounded. Ground wire must be continuous throughout installation, never switched on-off, never used as a Neutral wire. Generally ... use same size as other wire in circuit Buy: 12 gauge copper ground wire Ground wire Green ground wire Ground pigtails Ground rods/ ground clamps at Amazon |
 Non metallic flexible cables must carry ground wire, but do not have hazard of short circuit causing injury from shock. Armored steel cable can be used as a grounded connection, and will protect wires from damage. Metal can be energized from an insulation failure. All conduit ...metal, plastic ... flexible and rigid ... must be attached to structure, and attached to enclosures, boxes. Movement, damage and deterioration are major cause of electrical failure. Buy: Non-metallic flexible conduit Power whip Armored cable Southwire armored cable cutter Pull boxes |
 Electrical tools must be insulated. Always best to disconnect power, but insulation failure, lack of proper grounding, grounded neutral, lack of GFCI, out-of-code wiring, generator operating without transfer switch, and other problems still pose a risk to anyone working on electric power ... even when breaker is off. Buy: Electrician tools kits KLEIN TOOLS Tools kits IRWIN tools KNIPEX Telephone cable knife Low Voltage Mounting Bracket for Telephone |
 600 volt 12 ga Stranded wire ot THHN wire is good for conduit with multiple wires ... but stranded cannot be installed under screw terminals on outlets, switches, timers etc without risk ... of heat causing splayed strands ....that come loose ... and begin to arc. Connect stranded to short piece of solid copper wire, and attach solid to screw terminal. Do not solder residential or commercial wiring. Project wire, extension cords, thermostat, bell and automotive wire are not rated for residential or commercial wiring. Only wire maked 600 volt can be used for permanent household wiring. Buy: Southwire 600 volt stranded wire Rolls of stranded wire HOOK UP Wires |
 Protect wiring from damage Use nipper instead of pliers or screwdriver for removing staples (and nails). Do not damage cable or wires inside cable. -Code says: Cable SHALL BE secured without damage to the outer covering. NEC sec. 336-15 Buy End cutting nippers at Amazon |
  Electrically insulated tools When removing insulation from wire, do NOT score or put cuts on surface of copper wire. Doing so increases resistance and heat on wire and creates possible weak point. Buy tools: KLEIN TOOLS Wire strippers at Amazon Electric Wire Stripping Machine Linesman pliers Utility knife at Amazon |
 Multimeters Voltage is tested across two separate wires. Ohms or resistance is tested across both ends of same wire. Amperage is tested along one or two points on same wire. Buy: Analog multimeter Multimeters at Amazon Klein multimeter Electric testers at Amazon Clampmeter for testing amp flow on line |
 GFCI circuit breaker A GFCI circuit breaker will protect all boxes on circuit. Circuit must be grounded. Ground wire must be continuous and connected to each piece of equipment. White wire on circuit breaker must be connected to Neutral busbar inside the breaker panel. Buy GFCI circuit breakers |
Push down 1" wide Push down breaker Plug-in breaker Buy single-pole: Choose from 15 to 60 amp Eaton CL series Siemens 15-60 amp Single-pole tandem breaker Tandem breakers |
Push down 2" wide Push down breaker Plug-in breakers Buy double-pole: Choose from 15 to 125 amp Choose from 15 amp to 200 amp Eaton CL series circuit breaker Siemens circuit breaker Double pole GFCI |
     
 
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Single
pole timer (With or without neutral wire available inside box) Applies to most ordinary in-wall timers How to replace ordinary wall switch with single pole timer Your wall switch has 2 wires, plus green ground screw for bare-copper ground wire. Timer has 3 wires, plus green ground wire. Extra wire on timer is used to run clock inside timer. Typical in-wall timer clock consumes .8 Kwh per year Manual says: Timer-Black-wire to Hot; Timer-Red-wire to Load (lights) Timer-White-wire to Neutral. Timer-Green to ground. Heres what to do 1) Timer-green-wire connects to bare ground wire. 2) Switch has 2 wires. Take switch wires and connect them to timer-black-wire and timer-red-wire. Choose either one for now. Variations: (Leviton timers have blue wire instead of red) (and Some 3-way timers have both red and blue... use blue and cap red) 3) In back of electric box are white wires twisted together and covered with wire connector. Connect timer-white to these wires. 4) If electric box does not have white wires described above, then connect timer-white to bare ground. Timer will work until you have time to run additional White neutral wire from nearby outlet. 5) Turn on electricity, and push ON-OFF button. If lights come on, timer is wired correctly. If lights do not come on, then reverse timer-red and timer-black wires. If lights blink after installing timer, then white wire is connected to red wire. Resources See all programmable timers See all countdown timers |
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1) Strip
stranded wire longer. 2) Wrap stranded around the solid wire 3) Twist wire connector over both wires 4) Twist wire nut very tight 5) Pull stranded wire and make sure it will not come loose |
 EJ500 |
 Tork |
 ST01C |
 Honeywell |
 Aube |
 Woods |
Intermatic |
Leviton |
GE |
Sylvania |
 Omron |
 24 volt timers |
 3-phase timer |
Countdown |
 Westinghouse |
 Outdoor timers |
 Diehl timers |
Dayton |
| GE 15313 incandescent-only
7-day timer See GE 15313 Leviton LTT series countdown / incandescent only See Leviton LTT |
Digital Timers with NO neutral wire Follow same directions shown above, except ignore white wire connection. |
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3-way Timers Open following links Resources: GE 15312 wiring Applies to GE 15312 timer  Resources: Intermatic ST01C wiring Intermatic Ej500 wiring Applies to ST10C, Ei600, Ej500, Ej600, Ei400  Remember, the timer replaces 1 of the three-way switches. The other three-way switch is rewired to operate as ordinary on-off switch. The remaining switch functions to reverse the timer programming. |
 Larger image of wiringAnother image of wiring Instruction manual and wiring |
Single-pole spring wound timers
Spring wound timers have connections for 2 wires, and some
models have 4 wiresResources: See all spring-wound timers |
 Compare all Water heater Box timers |
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How
to wire DIN rail timers
Resource: How to wire din rail timers |
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In-wall water heater timers Resources: How to wire timers for water heater timer |
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3-Phase timer Resources: How to wire 3-phase timer How to install 3-phase surge protector |
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How to wire switches Resources: How to wire switches |
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240Volt outlets and plugs Resources: How to wire 240Volt outlets and plugs |
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GFCI Buy: GFCI breakers at Amazon< Arc fault breakers at Amazon Resources: How to wire GFCI outlets and combo-switches |
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Resources: Select correct wire size Select and install wire connector |
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Resource: Electricity: The grid is defined by three parts: transmission, distribution and end user. The following links show how it works Power plant to end user power pole Power pole to residential breaker box Power pole to commercial breaker box How to wire residential electric How to wire commercial 3-phase Why you need ground wire How to wire 3-phase timer 3-phase water heater |
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