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Applies to T103, T103R, T103P, T103M, T103PCD82, T173, T173R T173M see all models
Resource: Safe electric wiring
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How
to wire T103 / T173 series timer Applies to T103, T103R, T103P, T103M, T103PCD82, T173, T173R T173M see all models Resource: Safe electric wiring |
 Large image Indoor metal box Buy: T103 series at Amazon Resource: T103 series models/ manuals |
 Larger image Outdoor metal box/ day skipper Buy: T173 at Amazon |
 Larger image Outdoor metal box Buy: T103R at Amazon |
 Larger image Outdoor metal box/ day skipper Buy: T173R at Amazon T173CR with carryover |
 Larger image Outdoor plastic box Buy: T103P at Amazon |
 Larger image Mechanism only Buy: T103M at Amazon Buy: T103PCD82 |
| 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 or 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 marked 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 |
| Resources: T104 & T174 wiring T103 & T173 wiring T101 & T171 wiring T101B wiring T102 & T172 wiring T105 & T175 wiring T106 & T176 wiring |
Wiring
for T100 series |
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120V Manuals: T103 series models/ manuals T173 series models/ manuals Resources: See wire sizes and load ratings |
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120V or 240V T103 timer requires neutral wire T-103 has WG1570 120V clock motor Buy: WG1570 Intermatic T103 timer can be wired to control 120 Volt circuit -or- 240 Volt circuit The key is that the T-103 has 120 Volt clock motor and a white Neutral is always connected at pole A (If you have 240Volt line, and no neutral wire, then change clock motor to WG1573. Or to get this to work until new clock motor arrives, connect ground wire to terminal A, and one of the 240V Hot wires to Terminal 1) Resources: T-103 manual T100 series parts T170 series parts See T100 timer series See T173 timer series How to operate and set T103 timer |
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120Volts Same wiring applies to T173 timer |
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Two 120Volt loads Same wiring applies to T173 timer |
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T-103
controls any voltage/
Dry terminals Move motor leads to terminals A and 1 Connect any voltage to terminals 3 and 4/ SPST |
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T103 controls two loads | ||
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T103 integrates with another timer | ||
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T-103
timer controls 3-phase Use T103 120Volt timer to control 3 phase loads Same wiring applies to T173 timer Resource: More 3-phase |
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 Wire T103 to control 3 phase contactor Larger image |
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T-103 clock motor (120 volt) Buy: WG1570 for 60 Hz 120V Amazon |
Clock motors
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T-103 timer wired for 24 Volts CW190-10 for 24 volt 60 Hz 24V at Intermatic |
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T-103 changed to 240Volt (208-277V) Buy: WG1573 for 60 Hz 208-277V Amazon |
Change T-103 timer from 60Hz to 50 Hz WG1571-10D motor for 50 Hz 120Volt WG1574-10D motor for 50Hz 208-277V Amazon |
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T-103 timer wired for 480 Volts Buy: WG1576 for 60 Hz 480V at Amazon |
How to replace Intermatic clock motor | ||
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Trippers Dial can have 12 sets ON-OFF trippers Buy: 156T1978 trippers Amazon |
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Insulators Translucent 124T1952 double-pole T103, T104, T106 124T1952 double-pole T173, T174, T176 Buy: 124T1952 at Amazon Black rigid 124T2411A rigid Buy: At Amazon |
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Convert
indoor timer into outdoor timer: Buy different enclosure Buy: 2T2502GA beige plastic Outdoor box at Amazon Resource Enclosures |
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Resource: How to take apart and repair T100 series timers |
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 Keep wires straightUse solid copper wire If wiring terminal or end of wire are covered with green, use emery board to clean terminal and sandpaper to clean wire. |
 Applies to timers, wifi etc/ info source Intermatic |
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Both
wires MUST be same gauge Straighten each wire If wire is corroded or overheated, clean the end with sandpaper and wipe with cloth. If wire has been melted, cut back and reattach, or replace wire. Tighten screw very tight against copper wire |
 Use wire connector |
 Use push-on wire connectors |
3 wires/ or different gauge wires Join wires with wire connector or push-on connector Run jumper to screw terminal. Buy: Push on wire connectors at Amazon Red 3P connector (shown) for 10-14 gauge wire Connector assortment Resource: How to select and install wire connector |
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Fire safety/ Do not put stranded
wire under screw plate Problem1: picture shows 2 different gauge wires under screw plate Problem2: Stranded wire will expand and contract and come loose under screw plate, even if it is the only wire under the screw plate. Attach stranded wire and solid wire with connector, and run solid copper jumper wire to screw terminal Resources: Timer caught fire Load ratings for Intermatic timers/ pdf |
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| Wiring for other T100 series timers |
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T101 Wiring: How to wire T101 and T171 series timers |
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T101B Wiring: How to wire T101B timer Applies to T101B with separate wiring terminals |
| T103 Wiring: How to wire T103 and T173 series timers |
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T104 Wiring: How to wire T104 timer Applies to T103, T103R, T103P, T103M, T103PCD82, T173, T173R T173M see all models |
| How to wire Intermatic T102: How to wire T102 and T172 series timers |
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How to wire Intermatic
T105: How to wire T105 timer Nema 1 indoor enclosure/ To convert to 208-277V operation, replace WG1570 clock motor with WG1573 clock motor |
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How to wire Intermatic T106
timer: How to wire T106 timer Nema 3R indoor-outdoor enclosure To convert to 120V operation, replace WG1573 clock motor with WG1570 clock motor |
| How to wire Intermatic pool timer: How to wire pool timers |
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Control centers: Control centers: + manuals and parts All control centers and parts |
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Intermatic/ Grasslin enclosures Metal and plastic enclosures |
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| Intermatic sprinkler timers and wiring |  How to wire Sprinkler timers + rain sensor + manuals + buying options How to connect rain sensor when timer does not have rain terminals How to Set & Troubleshoot Intermatic sprinkler timer/ pdf |
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Multi-function timers and wiring 40 amp Multi function timers and manuals |
 
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T1906-5 T1975-6 heavy duty timers 20 amp Multi function timers and manuals |
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ET
series digital timers/ 20-30 amp/ 120-277 volt/ multi-channel
(same timer controls two circuits with different programming) ET series timers |
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Timer modules/ 16 amp/ 12-240 volt Timer modules/ 16 amp/ 12 to 240 volt |
 
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