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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 |
 Example 3 phase
switch/timer circuitWire colors vary 3-phase breaker located in panel 3-phase 3-wire goes to contactor (or motor starter) and then to motor. Grounding indicated, but ground wire not shown No neutral wire shown, and not needed for example motor circuit 2 Hot wires pulled from 3-phase go to double-pole switch or timer. Switch or timer activates motor starter or contactor, which starts motor. Fused disconnected added between breaker and starter and motor, and is located at motor. Required by code to protect anyone servicing motor and to protect wires and motor from overheat.. Fused disconnect added between 3-phase and double-pole switch or timer. Required by code to protect anyone working on circuit, and to protect wires, switch and contactor  ResourceHow to wire 3-phase timer 3-phase motor starter wiring/ pdf Buy: Resources for 3-pole contactors 3-pole contactors at Amazon 3-pole disconnect at Amazon Leviton MS302-DS 600Volt 30 amp double-pole motor switch at Amazon Resources for 3-pole contactors |
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277 volt timer Timer draws power from 3 phase line of 3-phase main panel |
 480 volt timer Start with Intermatic 240 volt T104 40 amp timer -or- T174 w day-skipper Change to 480Volt timer by changing clock motor from 240V WG1573 to 480V WG1576  Buy:T104 timer T174 timer 480 volt clock motor Resources: How to wire T104 timer T100 series timers and manuals How to set and operate T104 timer |
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208-240 Volt timer
208-240 Volt 3-pole contactor Buy: Resources for 3-pole contactors 3-pole contactors at Amazon 208-240 3-pole contactor Resource Intermatic T104 and T174 GM40 DTU 40 Fuseholder |
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120 Volt timer 120 Volt 3-pole contactor Control any 3-phase voltage Buildings with 3-phase power also have Neutral wire used to power ordinary 120Volt outlets. 1) Use 120 Volt timer. 2) Install 3-pole contactor with 120Volt coil 3) Timer controls 120Volt coil. 4) 3-pole contactor turns 3-phase power ON-andOFF. Examples of this timer: Intermatic EH10 7-day programmable Intermatic T101 24-hour analog Repeat cycle timers Dawn-dusk timer 365-day programmable timers 277Volt 24-hr analog timer Resource Resources for 3-pole contactors 3-pole contactors |
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120
Volt timer
24 Volt 3-pole contactor Buy: Resources for 3-pole contactors 3-pole contactors at Amazon Resource: ET series timers and manuals/ 120V Neutral to terminal 1, 120V hot to terminal 2/ contactor wires to terminals 3 and 4 GM seriers timer and manuals/ 120V to terminals L1 and L2/ contactor wires to terminal COM and NO terminals |
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3-phase off delay timer Other applications for timer .. wiring not illustrated here: Off-delay, repeat cycle, delay on break, pulse generator, latching, single shot. Input voltage 12V - 240 volt (50-60 Hz) Indicator lights .1 seconds to 10 days Buy: Elko delay timer Migro delay timer Migro relays and timers Resources: CRM-93H 10-function CRM-91H 10 function CRM-82 two-function: Delay timer for motor or pump/ 120Volt to 240Volt |
 Timer controls LC1D contactorBuy 120 volt 7-day timer with 120 volt coil 30 amp contactor 240 volt timer 240 volt coil 32 amp contactor Schneider contactor Motor contactors Buy: fuseholder: ANL fuseholder Buy fuseholders at Amazon Buy: THC 15 timers THC 15 120 volt Resources: More DIN rail timers Fuseholder |
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Phase monitor Protect circuit in event of low voltage on 1 line. Buy: Single phase 95-270 volt range IMC402 3-phase 80-300 volt range ICM phase monitor Resources: Fuseholders IMC 402 pdf IMC400 manual Siemens .pdf How to wire phase monitors |
3 phase 4-wireDawn-dusk option: 12-24-36 volt AC-DC 120-208-240-277 VAC Use with 120-208, High leg Delta, 240, 277-480. ST01 battery-operated timer is dusk-dawn programmable timer rated for 12-24 V AC/DC and 120-208-240-277V AC. Not rated for 480, 600 volt. Rated for inductive loads (contactor) Timer powered by CR2 battery/ requires no voltage to operate switching. Cold weather: Battery cannot be exposed to freezing temps beyond 22 days. Cap red wire for dusk-dawn operation. OR connect red and blue timer wires together for reverse dawn-dusk operation. Fuse protects 15 amp timer. Connect power to timer black wire. Connect load to timer blue wire. For this illustation, select contactor with coil voltage that matches phase voltage. (measured between Hot wire and Neutral). 3-phase wire colors vary. Buy: Intermatic ST01 timer Ei600 5-year warranty timer CR2 replacement battery at Amazon |
 3 phase 3-wireDawn-dusk option: 12-24-36 volt AC-DC 120-208-240-277 VAC Use with 120-208, high leg delta, 240 ... but not 277-480 since 2 hot legs would pull 480 volt. Timer not rated for 480, 600 volt. For this illustation, select contactor with coil voltage that matches line voltage (measured across 2 Hot wires). Buy: Intermatic ST01 timer Ei600 5-year warranty timer CR2 replacement battery at Amazon |
| Control secondary circuit with auxiliary contacts | Add delay circuit using contractor block |
 Square D Auxiliary contacts Schneider Auxiliary contactor Eaton Auxiliary contacts Siemens auxiliary contact Siemens Auxiliary contactor Mars Auxiliary contactor Noark auxiliary contact Furnas Auxiliary contactor |
  Buy
Contact blocks at AmazonAuxillary contact block at Amazon LADT2 with 30 second delay Dayton contact block Resource: How to wire contactor block |
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Control
3-phase using 120Volt
timer with 4SP & 3SP relays
Same wiring applies
to both timers shown
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120V
or 277V Intermatic T7401B 120Volt 7-day timer Intermatic T7402 277Volt 7-day timer Resource: T7000B Sell sheet Minimum 2 hour ON-OFF 21 ON-OFF settings per week |
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Tork
7300 24-hour Timer 3SP relays 120Volt clock motor 8-14 gauge wire 40 amp contacts Single-phase -or- 3-phase 3-wire Resource: Tork timers and manuals |
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Intermatic
V45000 astronomic 24-hour dawn-to-dusk
timer 3SP relays 120Volt clock motor 8-14 gauge wire 40 amp contacts Single-phase -or- 3-phase 3-wire Resource: Instruction manual 120V Intermatic timers and manuals |
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Resource: Compare box timers DPDT timers Intermatic Control water heater w/ Z-wave |
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Resource: Intermatic control centers: and parts Digital control centers and parts Tork control centers and parts Subpanels All control centers and parts Enclosures |
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Resource: Programmable timers Countdown timers Off delay timers On delay timers Timer modules Din rail Twin & one-shot Woods Intermatic Tork |
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Recirculation systems |
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