Page 1 of 3: Overview /and Gather materials
Skip to Page 2: Connect the wires
Skip to Page 3: Wiring details
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How
to install water heater timer Page 1 of 3: Overview /and Gather materials Skip to Page 2: Connect the wires Skip to Page 3: Wiring details |
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Project
overview: NO
Neutral Use for timers and switches that do not require Neutral Ordinary switches and some timers do not require Neutral, just a Hot wire, listed below. Attic installation shown in illustration, wiring applies to any location, and any electric water heater, or other 30 amp load. Buy: Intermatic ST01c timer/ 1 year warranty ST01a almond Intermatic ST01K combination timer Spring wound timers Leviton LTT countdown Resources for switches: Wiring for all switches and timers Control 2 water heaters with 1 switch Control water heater with 2 switches Control 1 water heater with 30Amp switch |
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Project
overview: Requires
Neutral Use any programmable timer, zwave or wifi device that is rated for resistive load. Use Hot and Neutral from nearby 120 volt outlet to power device. Rule of thumb: Outlet box will always have Hot and Neutral, Switch box will always have Hot but not always Neutral, Ceiling box with light will always have Neutral but only has Hot when light is on. Buy: Programmable timer Countdown timer Zwave switch Wifi switch Resource: Compare programmable timers Compare countdown timers |
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Alternative using box timer Buy 240 volt/ 7-day: Intermatic EH40 timer at Amazon 30 amp timers Resource: Compare box timers How to wire EH40 timer |
Project materials |
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Choose
timer or switch Buy: Intermatic ST01 timer Spring wound timers Buy: requires neutral Programmable timer Countdown timer Zwave switch Wifi switch Resources: Compare programmable timers Compare countdown timers |
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Old work box Use for new switch, timer etc. Drop wire into wall, Cut hole to fit box, reach in and pull wire through hole, put wire inside box, push wire back into hole as you insert box into hole Buy: Thomas and Betts old work box at Amazon Old work boxes at Amazon Resources: See How to install old-work box |
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Contactor with 240V coil
for no Neutral Contactor with 120V coil for requires Neutral Contactor controls 30 amp water heater load, rated 1 million operations Buy: 240Volt coil 2-pole contactor 120Volt coil 2-pole contactor Resources: Read more about contactors and relays |
 Plastic 6x6x4  6X6X4 Metal box w/ Contactor |
Choose
metal or plastic 6x6x4 junction box Plastic box: no pre-drilled holes, but easy to drill... must drill size 3/4" holes for Wire connections, size 1/2" hole for fuseholder, and 3/16" holes for bolts. Plastic box does not need ground screw connected to box. Buy Plastic Cantex 6x6x4 PVC plastic enclosure with cover at Amazon Bud industries 11x7x5 box without knockouts Metal box has knock-outs for 1/2" and 3/4" connector ... must drill 1/2" hole for fuseholder, drill 3/16" holes for bolts, and drill and thread hole for 10-32 ground screw. Metal box must be grounded. Suggest pre-painted steel box for appearance. Buy Metal Bud industries 6x6x4 Nema 3R Outdoor box Hinged door/ 6x8x4 Polycarbonite enclosure Bud industries boxes at Amazon Arlington boxes at Amazon Resources: See more about boxes |
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Choose
metal junction box Fits multiple contactors and relays see image Outside dimensions: 9-3/8x 5-1/2 x 3-5/8 Nema 3R indoor/outdoor enclosure with pre-installed ground screw 1/2 and 3/4 knockouts located sides and bottom Painted metal, weathertight hinged door, locking hasp Buy: 2T511GA gray painted 2T2485GA beige painted |
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Tapered
drill bit for plastic or
metal box Step drill bit for any size hole Buy Step drill bits at Amazon Neiko tapered drill bit 1/4"-1-3/8 holes Black and Decker Complete guide to wiring Resources; See inside main breaker box |
 120Volt 14-2 wire will have Black-white wires 240Volt, 10-2 wire can have red-black or white-black wires... always add piece of black tape to white wire when used for 240Volt power. Adding black tape will signal that wire carries power Resource: See wire color code and amp ratings |
Lengths of wire Buy: White/ #14 gauge wire for 15 amp 25 foot 14-2 NMB indoor wire with ground 50 foot 14-2 indoor wire with ground 100 foot 14-2 indoor wire with ground 100 foot 14-2 UF outdoor burial with ground Yellow/ #12 gauge wire for 20 amp 25 foot 12-2 NMB indoor with ground 50 foot 12-2 indoor with ground 100 foot 12-2 UF outdoor burial with ground #10 wire required for water heater Orange/ #10 gauge for for 30 amp circuits including water heater 25 foot 10-2 NMB indoor with ground 100 foot 10-2 NMB indoor with ground 50 foot 10-3 indoor with ground Resources: See wire color code and amp ratings |
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Buy
fuseholder and 15 amp fuse Used for No Neutral installation Or when nearby hot wire is not available  Buy: Panel mount fuse holders at Amazon ANL fuseholder Buy fuseholders at Amazon Ceramic fuses at Amazon Din rail fuseholder 10 x 38 mm fuse Resources: Read about fuseholders |
 Blue 14-16 gauge wire Yellow 12-10 |
Terminals Use to connect 120 volt wires to contactor see image Add solder when crimping to solid wire Buy: Terminal kit with crimp tool Blue 14-16 gauge Yellow 12-10 gauge Assortment Resources: More about terminals |
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Wire
connectors Buy: Wire connectors at Amazon Push-in wire connector up to 14-12 gauge Resources: How to install wire connector |
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Optional
Indicator light Buy: 240Volt Pilot light at Amazon Best 240 volt 120Volt pilot light at Amazon Indicator lights at Amazon NSI indicator lights Resources: See illustration of 120Volt & 240v pilot light |
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Staples
and clamps All wires, conduit and boxes must be firmly attached to structure (2x4, siding etc) Buy Cable staples plastic Cable staples metal 1/2" conduit clamp |
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Wire
connectors
All wires and conduit going into metal or plastic box must be firmly attached to the box Buy Metal 1/2" squeeze connector Flexible conduit connector PVC terminal adapter Raco locknut |
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8-32
x 3/4"
bolt w lock nut Buy: 8-32 tap Tap handle |
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Ground
screws Needed to connect ground wire to metal box Not needed with plastic box Use 10-32 tap to thread hole Buy: 100 pack ground screws 8-32 tap Tap handle |
You
have the materials.✔   Go
to Page 2: connect
the wires. |
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| Insteon 30 amp z-wave load controller Insteon load controller manual |
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Buy
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