A switching network is required to connect 64 incoming trunks, with 64 links at each stage. Find the minimum number of crosspoints needed for a 2 or 3 stage switch. Sketch a fully interconnected, three stage network for the same number of incoming and outgoing trunks, using 3 x 4 switches in primary stage and 4 x 4 switches in the tertiary stage. How many crosspoints are required?

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New dishwasher circuits can be wired directly to NM cable. The circuit breaker is the disconnect. O No answer text provided O False No answer text provided. True

8:33 Refer to the National Electrical Code or the working drawings when necessary. Where applicable, responses should be written in complete sentences. Complete the following table using the following circuits: 1. Eleven 120-volt duplex receptacles for general use. Receptacle loads are considered to be noncontinuous and are not subject to the 80% load limitation as applied for con- tinuous loads, 2. Ten 120-volt fluorescent luminaires, rated at 150 volt-amperes each. 3. Eight 120-volt incandescent luminaires, rated at 200 watts each. 4. One 240-volt exhaust fan, rated at 5000 watts. 5. One 120/240-volt single-phase, 3-wire feeder, 40-kVA continuous load, originating in a room with an ambient temperature of 100°F (38°C). Row Circuit Number 1 3. 1 Calculated Load in Volt-Amperes Calculated-Load in Amperes 3 Load Type 4 Load Modifier 5 OCPD Selection Amperes 6 OCPD Ampere Rating 7. Minimum Conductor Ampacity 8. Minimum Conductor Size Type THHN/THWN 9. Ambient Temperature 10 Temperature…

It is often desirable in designing an electric wiring system to be able to control a single appliance from two or more locations, for example, to control a lighting fixture from both the top and bottom of a stairwell. In home wiring systems, this type of control is implemented with three-way and four-way switches. A three-way switch is a three-terminal, two-position switch, and a four-way switch is a fourterminal,two-position switch. The switches are shown schematically in P2.40(a), which illustrates a three-way switch, and 2.40(b), which illustrates a four-way switch. If the lamp (appliance) is to be controlled from more than twolocations, four-way switches are used in conjunction with twothree-way switches. One four-way switch is required for eachlocation in excess of two. Show how one four-way switch plus twothree-way switches can be connected between a and b in P2.40(c) to control the lamp from three locations. (Hint: The fourwayswitch is placed between the three-way switches.)

The maximum electrical trade size of intermediate conduit is a.) 150 mm b.) 125 mm      c.)  200 mm      d.) 100 mm

What is the total number of systems?

5.a. Which of the following tend to have the smallest splice loss?A. ConnectorsB. Mechanical splicesC. All connectors have the same splice loss.D. Fusion splices5.b. What's the best way to install cable in an existing duct?A. Push the cable into place.B. Blow the cable into place.C. Pull the cable into place.D. New cable can't be installed in existing ducts.5.c. Which of the following SFF connectors is a simplex connector?A. MUB. Opti-JackC. MT-RJD. Dual-SC

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A.1. How many normally open auxiliary relay contacts are shown in the schematic diagram in Figure A7?A. 2 B. 3 C. 1 D. 0 A.2. What type of diagram is shown in Figure A7?A. Three-line schematic diagramB. Block diagram C. Wiring diagram D. Single-line ladder diagram A.3- What type of component is labeled A in figure A7?A. oil-type breaker, B. auxiliary contact, C. Normally closed breaker, D . NC pressure switch