Bus Bar For Building Wiring

General-use Receptacle

Conduit Water Heater

Wiring a Water Heater with Flexible Conduit

Flexible conduit connect

Install a 30-amp, 240-volt circuit for most electric water heaters A water heater circuit is wired in much the same way as an air conditioner circuit (circuit map 12. page 160). Install a junction box near the water heater then use 10/2 NM cable to bring power from the service panel to the |unction box ;ieft) Use flexible metal conduit and 10-gauge THHN,THWN wires to bring power from the |unction box to the water heater wire connection box trighti Connect black and red water heater leads to the white and black circuit wires Connect the grounding • ire to the water heater grounding screw

Circuit Breaker Panels

The circuit breaker panel is the electrical distribution center for your home. It divides the current into branch circuits that are carried throughout the house. Each branch circuit is controlled by a circuit breaker that protects the wires from dangerous current overloads. When installing new circuits, the last step is to connect the wires to new circuit breakers at the panel. Working inside a circuit breaker panel is not dangerous if you follow basic safety procedures. Always shut off the main circuit breaker and test for power before touching any parts inside the panel, and never touch the service wire lugs. If unsure of your own skills, hire an electrician to make the final circuit connections. (If you have an older electrical service with fuses instead of circuit breakers, always have an electrician make these final hookups.)

If the main circuit breaker panel does not have enough open slots to hold new circuit breakers, install a subpanel (pages 194 to 197). This job is well within the skill level of an experienced do-it-yourselfer, although you can also hire an electrician to install the subpanel.

circuits

Slimline circuit breakers require half as much space as standard smgle-pol breakers. Slimlines can be used in a crowded panel to make room for added circuits or a subpanel feeder breaker

Grounding bus bar has terminals lor linking circuit grounding wires to the main grounding conductor In a main panel, the grounding bar is bonded to the neutral bus bar

120-vott branch

Neutral service wire carries current back to the power source alter it has passed through the home

Two hot service wires provide 120 volts of power to the mam circuit breaker These wires are always HOT

Neutral bus bar has setscrew terminals for linking all neutral circuit wires to the neutral service wire

Ground Bus Bar

Two hot bus bars run through Grounding conductor the center ot the service panel connects the service panel supplying power to the mdi- equipment to a metal cold vidual circuit breakers Each waier pipe or grounding —

190 carries 120 volts Ol power rod driven inlo the earth pole circu breaker us< ally 30 to 5 amps m size It is wired the same .va as a 120/24C volt circui'

120/240-volt branch circuit

Two hot bus bars run through Grounding conductor the center ot the service panel connects the service panel supplying power to the mdi- equipment to a metal cold vidual circuit breakers Each waier pipe or grounding —

190 carries 120 volts Ol power rod driven inlo the earth pole circu breaker us< ally 30 to 5 amps m size It is wired the same .va as a 120/24C volt circui'

120/240-volt branch circuit

Neutral service wire carries current back to the power source alter it has passed through the home

Two hot service wires provide 120 volts of power to the mam circuit breaker These wires are always HOT

Main circuit breaker protects the hot service wires from overloads and transfers power to two hot bus bars To work inside the service panel safely the main circuit breaker must be shut oft

Double-pole breaker wired for a 120/240 circuit transfers power from the two hot bus bars to red and black hot wires in a 3-wire cable This wiring is also used for double 120-voit circuits that share a common neutral wire circuits

Main circuit breaker panel distributes the power entering the home into branch circuits (Note: Some circuit breakers have been removed for clarity )

Neutral bus bar has setscrew terminals for linking all neutral circuit wires to the neutral service wire

Slimline circuit breakers require half as much space as standard smgle-pol breakers. Slimlines can be used in a crowded panel to make room for added circuits or a subpanel feeder breaker

Grounding bus bar has terminals lor linking circuit grounding wires to the main grounding conductor In a main panel, the grounding bar is bonded to the neutral bus bar

120-vott branch

Before installing any new wiring, evaluate your electrical service to make sure it provides enough current to support both the existing wiring and any new circuits (pages 148 to 151) It your service does not provide enough power have an electrician upgrade it to a higher amp rating During the upgrade, the electrician will install a new circuit breaker panel with enough extra breaker slots for the new circuits you want to install

Safety Warning:

Never touch any parts inside a circuit breaker panel until you have checked for power (page 192). Circuit breaker panels differ in appearance, depending on the manufacturer. Never begin work in a circuit breaker panel until you understand its layout and can identify the parts

Wire Connecting Neutral Bars

Neutral feeder wire connects the neutral ous bar :ne sub-panel to :ne neuiial bos bar <n ihe main service car,el

Single-pole circuit breaker yanslers 120 volts ol pOAer trorr. one hot bus bar to the black hoi wire a 2wire cable

Double-pole breaker .ured tor 240 volts transfers power trom both hoi bus bars to while and black hoi wires in a 2-wire cable A 240-voit circuit has no neutral wire connection. ihe white wire is tagged with black tape to identity it as a hot wire

Neutral bus bar has selscrew terminals lor linking neutral circuit wires to ihe neutral teed wire leading back 10 the mam circuit breaker panel

Feeder cable brings cower to the subpar, Irom ¡he mam circuit breaker panel A 30-amp 240-,OH Subpanei ■eqijires ¿10 3 teeder cadi- co "ironed o, a 30- icubie-poie .a» er

Two hot bus bars pass through the cenie' ot the service panel supplying power to the individual circuit breakers Each carries 20 volts ot power

Circuit breaker subpanei be installed a hen ihe mam circuit

"ei does not have enough space circuit breakers lor new circuits you nsfli i Some circuit breakers have been removed lor clarity I

Two hot teeder wires Supply 120 • olts ot power to the two hoi bus bars

120-volt branch circuit

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Renewable Energy Eco Friendly

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable.

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