Electrician's instant answers
[...]... circuits, but not exactly the same (Figure 1.2) Parallel circuits have all devices arranged so that 1 Copyright 2003 by The McGraw-Hill Companies, Inc Click Here for Terms of Use 2 Electrician’s Instant Answers FIGURE 1.1 Diagram of a series circuit FIGURE 1.2 Diagram of a simple parallel circuit current is divided between them How do parallel circuits and series circuits differ? Series circuits maintain... is a conductor that carries current only in the event of a ground fault Don’t Do This! Use green wire nuts only on ground wires Never put hot wires together with green wire nuts 3 4 Electrician’s Instant Answers SERIES-PARALLEL CIRCUIT A series-parallel circuit consists of many minor circuits being connected in parallel and then several of the parallel-connected minor circuits are connected in a series... other submain Branch circuits or services can be connected to a submain through cutouts Wire used for a submain is usually smaller than the main or submain which supplies the submain 6 Electrician’s Instant Answers TAP CIRCUITS Tap circuits are created when a single energy-using device is fed from a circuit that is connected directly to the tap circuit without the interposition of a cutout BRANCH CIRCUITS... connected to a 30 amp 2 pole circuit breaker White goes on the neutral bar and green goes on the ground bar The other end of the circuit is connected to a 4 wire dryer receptacle 8 Electrician’s Instant Answers fastfacts When more than one receptacle on the same yoke is supplied by more than one branch circuit, there must be a means provided at the panel box where the branch circuits originate to... circuit breaker Disconnects must disconnect all of the ungrounded conductors of each temporary circuit 11 Copyright 2003 by The McGraw-Hill Companies, Inc Click Here for Terms of Use 12 Electrician’s Instant Answers On multi-wire temporary branch circuits, such as 12/3 Romex for example, all of the ungrounded circuits must be provided with a means to disconnect them simultaneously Temporary wiring cords... requirements The temporary pole may need to be higher if the power company supply is on the opposite side of the street or highway FIGURE 2.1 Example of temporary power for new construction 14 Electrician’s Instant Answers The man-made power pole needs to be braced in three directions with the rear brace in line with the service drop The braces need to be attached 4 feet from the top of the pole, spread out at... lighting • Exterior receptacles • Electrical service to outdoor buildings, such as gazebos and sheds 15 Copyright 2003 by The McGraw-Hill Companies, Inc Click Here for Terms of Use 16 Electrician’s Instant Answers OVERHEAD WIRING Overhead wiring is a common means of getting cable from one point to another when working outdoors Running cable overhead is less expensive, usually, than burying cable Yet, .