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Control water heater with Z-wave switch |
| 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 |
| 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 |
 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 Klein multimeter Electric testers Clampmeter for testing amp flow on line |
 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 |
 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 |
  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 Electric Wire Stripping Machine Linesman pliers Utility knife |
 GFCI circuit breaker A GFCI circuit breaker will protect all boxes on circuit. Circuit must be grounded. Ground wire must be continuous and connected to each piece of equipment. White wire on circuit breaker must be connected to Neutral busbar inside the breaker panel. Buy GFCI circuit breakers |
Push down
 1" wide Push down breaker Plug-in breaker Buy single-pole: Choose from 15 to 60 amp Eaton CL series Siemens 15-60 amp Single-pole tandem breaker Tandem breakers Buy double-pole: Choose from 15 to 125 amp Choose from 15 amp to 200 amp Eaton CL series circuit breaker Siemens circuit breaker Double pole GFCI |
| Finished project with zwave switch. | |
 Finished project with zwave switch. Image courtesy D Rodriquez from his project, based on step-by-step shown following link: zwave install ... he did the work while we exchanged email. Picture shows 6x6x4 metal enclosure with a contactor, indicator light to signal when water heater has power, flexible conduit with 10 gauge wire, Energy Smart water heater, zwave switch, and 120 volt power source for zwave switch... .... the 120 volt power source is an ordinary wall box (like a light switch or wall plug) containing 120 volt hot, neutral and ground wires and is where Mr Rodriquez pulled power for the 120 volt zwave switch and contactor .... ... the 24 volt transformer located on top of 120 volt power source is for another circuit, possibly a doorbell or security system, and has nothing to do with the zwave switch or water heater installation. How it works: The zwave switch is powered by 120 volt and stands ready to receive zwave command from phone or other zwave controller. When the zwave switch receives signal, it turns on the 120 volt circuit that goes to the 2-pole contactor located inside the metal enclosure. The contactor then 'closes' the 30 amp 240 volt circuit going to water heater and water heater receives power. With electric circuits: closed 'circuit' is ON, and 'open' circuit is OFF. Buy project materials from my affiliate links Zwave switch 6 x 6 x 4 enclosure 240Volt coil contactor 120 volt led indicator light Southwire |
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Control
and amp 240 volt with z-wave switch 240 Volt Z-wave switch Requires Neutral wire. Use ground wire as temporary neutral to check connection. Bring white neutral wire from any nearby light switch or outlet box Resource Materials list and detailed wiring instructions |
 Larger imageWhat is a contactor? Contactor is a switch. It is rated for high amp loads. High amp causes heat. Heat will damage regular electrical parts. Timers and wall switches can be damaged by high amperage. Each switch and timer has amp rating. Contactors are rated for more amps than ordinary wall switch or timer.  The electrical circuit lasts longer when a contactor is used because contact points on a contactor are designed to switch high amp loads without melting or being damaged by heat. The electromagnetic coil can be switched on-off using ordinary wall switch or timer. When voltage is applied to coil, then contact points close, and heavy amp circuit turns on. This lets you control heavy amp loads using ordinary wall switch or timer. Buy 2-Pole 40A resistive 120Volt coil 240Volt coil 24 volt coil Mars 2-pole and 3-pole contactors Resource 2-pole contactors 3-pole contactors for 3-phase control |
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2-pole
40 amp contactor in 6x6x4 enclosure Using #8-32 x 3/4" bolts Install contactor at angle leaves room for wire This is DPST contactor Double pole, single throw. So the contactor is 2-pole. It can turn off 2 wires. And single throw because both poles are on-off at same time. So you can switch both wires in 240 volt circuit. Buy Metal Bud industries 6x6x4 Nema 3R Outdoor box Hinged door/ 6x8x4 Polycarbonite enclosure Bud industries boxes at Amazon Arlington boxes at Amazon Resources:  How to wire contactor for water heater Enclosures |
| Zwave contactor | |
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Zwave
contactor Use the preassembled unit for zwave or wifi, instead of building from parts. I prefer using parts as shown above, instead of preassembled unit because of price, flexibility, and repairability. The preassembled unit is easier to install, and comes in Nema 3R indoor-outdoor enclosure. Buy Zwave contactor Intermatic zwave contactor Wifi contactor Woods WiOn wifi contactor DEWENWILS brand wifi Resource How to control water heater with zwave switch How to control water heater with zwave contactor Wifi contactor Buy: DEWENWILS brand wifi Wifi power switch Wifi contactor Resource How to wire wifi contactor How to wire GE contactor How to wire Intermatic contactor |
| WIFI contactor | |
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Migro wifi contactor Buy 240 volt coil 120 volt coil All in one: indoor-outdoor enclosure, contactor, sonoff wifi module, antenna. Connect incoming wires to same side of contactor as sonoff is connected. Connect load wires to opposite side of contactor. Use phone etc to turn load on-off. The contactor is not 50 amp as shown on amazon. 50 amp contactors are 5"x5" and considerably larger than ordinary 30-40 amp contactors that come with the Migro. Enclosure must be mounted to structure using screws etc. Cannot be mounted to unsupported siding, sheetrock etc without proper anchoring. Wires must be secured to structure. Extension cord is not approved for permanent wiring. Use only 600 volt electrical wire as printed on side of wire. Solid copper is best for heavy amp loads. Buy: Sonoff remote controls |
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Buy
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