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How to wire water heater with 2
timers Back to install timer |
| 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 /  Buy: 10-2 gauge/ 30 amp 10-3/ 30 amp Southwire electric tools |
Yellow
12 gauge 20 amp Yellow/ #12 gauge wire for 20 amp with ground Buy: 12-2 gauge/ 20 amp 12-3/ 20 amp NMB is house wiring UF is underground Rolls of stranded wire |
White
14 gauge 15 amp White/ #14 gauge wire for 15 amp with ground Buy: 14-2 gauge/ 15 amp 14-3/ 15 amp NMB is house wiring UF is underground |
 Buy: Armored cable |
 Southwire armored cable cutter Buy: Rolls of stranded wire |
Stranded wire  Buy: Rolls of stranded wire |
50-60
amp breaker use 6 gauge /  Buy: 6-2 wire Southwire electric tools NMB is house wiring UF is underground |
40-50
amp breaker use 8 gauge / Buy: 8-2 wire Southwire electric tools NMB is house wiring UF is underground |
  Copper ground wire 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 |
 Buy End cutting nippers at Amazon |
  When removing insulation from wire, do NOT score or put cuts on surface of copper wire. Doing so increases resistances on wire and creates weak point. Buy tools: Wire strippers at Amazon Linesman pliers Utility knife at Amazon |
 Buy: Multimeter Electrical testers |
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Override programmable timer with
countdown timer Grab Neutral wire from any nearby light fixture or outlet. Buy: Intermatic FD timer at Amazon 59017 programmable timer Resources: Programmable timers Countdown timers |
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Override programmable timer with
choice of
countdown timer, programmable timer, wifi, z-wave, Insteon home
automation Neutral and Hot arrive from any nearby outlet box Buy/ requires neutral Honeywell RPLS730B white/ RPLS731 almond |
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2-pole
40 amp contactor With removable dust cover on top. Select correct voltage needed to control coil. Water heaters typically use 240 volt coil, HVAC replacement is 24 volt coil. Typical 2-pole contactors are rated with 24, 120, 208-240 volt coils. Three pole contactors for 3-phase are available in more coil voltages not found in residential applications such as 277, 480 etc. Using the wrong coil voltage will cause problems. Selecting a contactor rated for more amps is better, so using 240 volt 40 amp contactor for 240 volt 30 amp water heater is fine. Buy 2-Pole 40A resistive 120Volt coil 40 amp 240Volt coil 24 volt coil Packard contactor Mars 2-pole and 3-pole contactors Rheem HVAC replacement contactors 50 amp contactor 60 amp contactor Resource: Fasco info sheet 3-pole contactors |
 Contactor shown is safe for 1 residential water heater. |
Pull
boxes/ metal
DPST contactor bolted into a 6x6x4 enclosure using #8-32 bolts Buy: 6x6x4 Metal box: has knock-outs for 1/2 and 3/4" ... must drill 1/2" hole for fuseholder, bolt holes to hold contactor, threaded holes for 10-32 ground screw, metal box must be grounded. Indoor 6x6x4 metal pull box with cover and knock-outs Indoor 6x6x4 pull box with knockouts on 4 sides/ Wiegman Indoor 6x6x4 pull box with knockouts on 4 sides/ Hoffman Outdoor 6x6x4 box with bottom knockouts Indoor 6x6x4 metal pull box with cover and knock-outs/ Raco Indoor/ hinged door 10x10 x 6 / Bud Industries Indoor / hinged door/ 6x8x4 box / Bud Industries Bud industries boxes at Amazon Arlington boxes at Amazon |
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Buy Electronic parts Industrial supplies Tools and home improvement Home and garden Hayward pool Pentair pool Southwire electric |
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Buy
Tools DEWALT Black and Decker Stanley SKIL Makita Porter-Cable Bosch Irwin Hand tools Klein hand tools Fluke electrical testing Dremel hobby tools Campbell Hausfeld air powered Tekton automotive Powerbuilt automotive Saws and saw blades |
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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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