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Toggle
between water
heater and car charger Choose one 240 volt
30 amp load or choose the other 30 amp load, but not both at same time.
Add another 240 volt circuit Toggle
between 30 amp water heater or 30 amp car charger
Toggle between 30 amp clothes dryer or car charger Toggle between clothes dryer or water heater Toggle between car charger and 240 volt motor/ pump as long as breaker is 30 amp and wire is 10 gauge. Resource:
safe electric wiring
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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. ![]() 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 |
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 |
![]() Armored cable can be used as a grounded connection, and will protect wires from damage. Metal can be energized from an insulation failure. Non metallic flexible cables must carry ground wire, but does not have hazard of short circuit causing injury from shock. 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: Armored cable Southwire armored cable cutter Non-metallic flexible conduit Power whip Pull boxes |
![]() Electrical tools must be insulated. Always best to disconnect power, but issues of insulation failure, lack of proper grounding, lack of GFCI, out-of-code wiring, generator operating without transfer switch, and other problems pose a risk to anyone working on electric power. Buy: Electrician tools kits Klein tools Tools kits |
![]() 12 ga Stranded 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. Buy: Rolls of stranded wire |
![]() 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 resistances and heat on wire and creates possible weak point. Buy tools: Wire strippers at Amazon 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 |
![]() Single-pole/ or 3-way switches/ rated 30 amp/ safe max 24 amp Buy: 30 amp 3-way switch Other type switches 30 amp 2-pole switch 30 amp industrial grade Leviton 3033 switch 30 amp motor switch 40 amp DP motor switch 30 amp DPDT switch 15 amp Pilot light switch |
See
larger![]() Buy: 30 amp 3-way switch Car charge station Incoming 240 volt line from breaker has 2 hot wires.... one hot wire (white wire) runs to both the charge station and the water heater ... connect the second hot wire (black wire) to the common terminal or different-colored screw on 3 way switch. ![]() Second wire to water heater connects to one of the other screws, and second wire to charge station connects to remaining screw. Generally best to hook wire around screw terminal, or at least get a bend on it, so it is less likely to pull loose. Insert wire on left side of screw so tightening screw pulls wire in, and doesn't push wire out. Tighten screw very tight using correct size screwdriver. Undersized screwdriver can cause a loose connection. All connections must be made inside electrically-rated enclosure (box) that is make to fit a switch. Enclosure must have a cover installed. Metal enclosure must be grounded, plastic box does not need ground. All devices and loads must be grounded. Wires, cables, boxes must be attached to structure. Buy: Deep switch box Note all switches have a volt and amp rating embossed in the metal or plastic part of switch. Single-pole and 3-way 30 amp switches are rated 120-277 volt. So these 30 amp switches work with 120, 208, 240, 277 volt. All double-pole switches are rated 240 volt, including 30 amp double pole. This mean it can be used on 120-208-240 volt. 30 amp switches can be used on 15-20-30 amp circuit, but not 40-50 amp circuit. Builder grade 15 amp switches that are rated 120 volt can only be used for 120 volt. Not for 240 or other voltage. 15 amp switches can be used on 15 or 20 amp circuit, but cannot control 30 amp load. |
Use following timers/ home automation to toggle between 30 amp loads | ||
![]() Larger image Permanent ON-OFF override Tork TU series 40 amp 120V-208V-240V-277V Automatically detects voltage 24 hour dial with 15 minute intervals Buy: Tork TU series DPDT/ 120-277V Buy Tork DTU digital 7-day timer Resources: Sell Sheet TU wiring manual TU instruction manual |
![]() Wifi/ Zwave 30 amp WiFi contactor Auto detect voltage/ 120, 208, 240, 277 volt WiOn contactor connects to app on phone Buy DEWENWILS brand wifi Wifi power switch WiOn contactor from Amazon 30 amp Zwave contactor Integrates into household zwave GE z-wave contactor Resources: How to wire WiOn for 120 volt and 240 volt GE z-wave manual |
![]() Larger image Permanent ON-OFF override 40 amp 120V-208V-240V-277V Automatically detects voltage 24 hour dial, 15 minute intervals Power outage backup option Buy: GM40AV 120-208-240-277V GM40AVQ w/ back-up battery Resources: GM40AV Manual GM40AV sell sheet |
![]() Buy: Tork TU series DPDT/ 120-277V timer 30 amp 3 way switch Buy: Eaton At Amazon Pass & Seymour At Amazon Car charger straight-blade Car charger L-blade Adapter: 3 prong dryer plug to electric car Electric connectors |
Larger image Toggle between 30 amp Loads Sometimes there are not enough circuit breakers for new 240 volt 3 HP irrigation pump, or above ground swimming pool pump, or water well pump ... or a temporary drainage pump etc ... or even a second water heater. Timers shown below are rated 40 amp. Use the 40 amp timer to toggle between 240 volt loads, and set timer to schedule irrigation pump. When pump is off, the water heater receives power. ![]() 240Volt circuit can be cut off by turning off one Hot wire (as illustrated), or two Hot wires. Using 1 Hot wire is convenient, and preserves the second set of contact point, or frees them up to control another load ... but 1 Hot might be against local code for irrigation pumps. Put water heater on NC normally open terminal, so water heater is ON when pump is Off. Same can be accomplished using 30 amp 3-way switch Buy: DEWENWILS brand wifi Wifi power switch Leviton 3033-2 3-way switch at Amazon Leviton 3-way 30 amp switch Pass and Seymour 30 amp 3-way switch Dishwashers at Amazon Resource How to wire 240Volt outlets Motor resources Not enough circuit breakers |
![]() Buy from my affiliate links Magnecraft box and cover Magnecraft w199 relays Siemens power relays Schneider W199 relay Programmable timers Zwave contactor WiFi contactor Resource: Magnecraft wiring |
![]() Toggle between car charger and water heater or pump, or any 240 volt load. Use any 15 amp timer, home automation switch or module or outlet ... or ordinary 15 amp single-pole toggle switch. Switch or timer or automation turns the relay on or off. When relay is on, then the NO terminal sends power to car charger. When relay is off, the NC contact sends power to pump, motor, water heater etc. |
![]() Larger image Another image | Contactor,
open-frame relay, and small relay with base will fit into Intermatic
metal and plastic enclosures.![]() 2T511GA outdoor metal enclosure gray 2T2502GA outdoor plastic enclosure beige 120Volt coil contactor 40 amp 240Volt coil contactor Resources: Contactors and relays Intermatic and Grasslin enclosures Electric code for enclosures ![]() Buy: 100 pack ground screws 8-32 tap Tap handle |
![]() | 6x6x4 enclosure or pull box Relay installed inside enclosure 120 volt connected to z-wave switch located on wall next to doorbell transformer (a good source for getting electric power), the z-wave switch controls 120 volt coil on relay, the relay toggles 240 volt between water heater and any 240 volt load. Wired with 240 volt indicator light Buy: 6x6x4 Metal box: has knock-outs for 1/2 and 3/4" ... must drill small holes for bolts to hold the relay, tap the threaded holes for 10-32 ground screw, metal box must be grounded. Indoor 6x6x4 metal pull box with cover /Raco Indoor 6x6x4 pull box / Wiegman Indoor 6x6x4 pull box / Hoffman Indoor/ hinged door 10x10 x 6 / Bud Industries Indoor / hinged door/ 6x8x4 box / Bud Industries Bud industries boxes at Amazon Arlington boxes at Amazon Pull boxes Altelix enclosures 17x14x6 Polycarbonate Polycarbonate enclosures Buy Tap and handle to cut threads for bolts Tap wrench 100 pack ground screws |
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10 gauge or 12 gauge? Compare your wire with short pieces of 10 and 12 gauge wire from local box store Check rating label on eachy electric device to find total amp draw. Always match amp rating with correct wire and breaker. 10 gauge for 30 amp breaker. 10 gauge wire usually has black-white or sometimes black-red. Black-white can be used for 120 or 240, black and red 240 volt only. 12 gauge for 20 amp breaker 12 gauge will have black and white wires. 12 gauge can be used for 120-240 same as 10 gauge wire. Buy: Southwire romex cable Resources: Match color code and amp rating for wire Basic house wiring |
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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 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 Do not install stranded wire under screw. 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 wire connector, and run solid copper jumper wire to screw terminal Take photo of wires before starting. ![]() Resources: Timer caught fire Load ratings for Intermatic timers/ pdf |
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What is 3-phase electric: power plant to end
user
How to wire 3-phase timer 3-phase water heater |
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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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