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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
water heater timer
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Indoor metal box
Buy:
T103 series at Amazon

Resource:
T103 series models/ manuals

T176 timer
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Outdoor metal box/ day skipper
Buy:
T173 at Amazon
T 104R
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Outdoor metal box
Buy:
T103R at Amazon
T 104R
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Outdoor metal box/ day skipper
Buy:
T173R at Amazon
T101P timer
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Outdoor plastic box
Buy:
T103P at Amazon
T101M
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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
6-2 wire
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
6-2 wire
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
armored cable
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
Southwire armored cable cutter
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
stranded wire
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
multimeter
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
>
T-103 120 Volt timer 120V
Manuals:
T103 series models/ manuals
T173 series models/ manuals

Resources:
See wire sizes and load ratings
Intermatic T-103 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
T104 controls any voltage
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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
T104 controls two loads
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T103 controls two loads
T104 controls two timers
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T103 integrates with another timer
T101 timer for 3 phase
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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

Wire T103 to control 3 phase contactor
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T-103 clock motor (120 volt)
Buy:
WG1570 for 60 Hz 120V Amazon
Clock motors
Intermatic clock motor>>>>> Intermatic clock motor
T-103 timer wired for 24 Volts
CW190-10 for 24 volt 60 Hz 24V at Intermatic
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
T-103 timer wired for 480 Volts
Buy:
WG1576 for 60 Hz 480V at Amazon
How to replace Intermatic clock motor

156T1961A tripper
Trippers
Dial can have 12 sets ON-OFF trippers
Buy:
156T1978 trippers Amazon
124T1952 Insulator
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124T2411A insulator pk 25
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
2T2485GA enclosure Convert indoor timer into outdoor timer:
Buy different enclosure

Buy:
2T2502GA beige plastic Outdoor box at Amazon

Resource
Enclosures
Resource:
How to take apart and repair T100 series timers
Keep wires straight
Use 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
Insdulation under screw plate
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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  
Push on wire connectors
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
Wiring for other T100 series timers
T101 Wiring: How to wire T101 and T171 series timers
T101B Wiring: How to wire T101B timer
Applies to T101B with separate wiring terminals
T103 Wiring: How to wire T103 and T173 series timers
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
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
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
Control centers:
Control centers: + manuals and parts

All control centers and parts
Intermatic/ Grasslin enclosures
Metal and plastic enclosures
Intermatic enclosures
Intermatic sprinkler timers and wiring Intermatic sprinkler timers
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
Multi-function timers and wiring 40 amp
Multi function timers and manuals
GM40 timer  Intermatic GM40AVE    Woods 59402 timer  Tork DTU water heater timer  
T1906-5  T1975-6 heavy duty timers 20 amp
Multi function timers and manuals
Intermatic T1906 timers
ET series digital timers/ 20-30 amp/ 120-277 volt/ multi-channel (same timer controls two circuits with different programming)
ET series timers
           Intermatic ET279 timer    Et70215 timer
Timer modules/ 16 amp/ 12-240 volt
Timer modules/ 16 amp/ 12 to 240 volt
MIL72E timer     FM1-timer   MIL72A timer   CN101A timer wiring   Intermatic PB300      




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Campbell Hausfeld air powered
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Saws and saw blades

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