Electrical Wiring: Residental - With Plans (Paperback) Package
18th Edition
ISBN: 9781305416376
Author: MULLIN
Publisher: Cengage
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Chapter 7, Problem 8R
To determine
Find the class type and the protection type of the fluorescent ballasts for all indoor applications.
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1. A14/2 type copper used for a general lighting branch circuit. Ampacity:______________ Maximum Fuse or Circuit Breakers Sizes:________________ 2.Three 8 AWG copper conductors with THHN insulation Installed in garage in electrical metallic tubing (EMT). The ambient temperature in the garage can reach as high as 110'F. All termination points for this circuit are rated 60'C. Ampacity:______________ Maximum Fuse or Circuit Breakers Sizes:________________ 3.Four 4 AWG copper conductor with THWN insulation imstalled in EMT in a basement. All termination points are rated at 60'C.
Ampacity:______________ Maximum Fuse or Circuit Breakers Sizes:________________ 4. An 8/3 Type UF copper cable installed underground from a house to a detached garage to feed a 120/240-volt subpanel. All termination points are rated at 60'C.…
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The resistance of a wire is 126.48 ohms at 1000C and 100 ohms at 300C. The temperature coefficient of this wire at 00C is ____________ per C0.
6. Ferrous metal raceways or enclosures are made with _______ content.A. brass or aluminumB. steel or brassC. aluminum or ironD. iron or steel
Chapter 7 Solutions
Electrical Wiring: Residental - With Plans (Paperback) Package
Ch. 7 - Is it permissible to install a recessed luminaire...Ch. 7 - If a recessed luminaire without an integral...Ch. 7 - Thermal insulation is not permitted to be...Ch. 7 - Recessed luminaires are available for installation...Ch. 7 - Unless specifically designed, all recessed...Ch. 7 - Plans require the installation of surface-mounted...Ch. 7 - A recessed luminaire bears no marking indicating...Ch. 7 - Prob. 8RCh. 7 - Additional backup protection for ballasts can be...Ch. 7 - Prob. 10R
Ch. 7 - The Code places a maximum open-circuit voltage on...Ch. 7 - The letter E in a circle on a ballast nameplate...Ch. 7 - A 120-volt lamp fluorescent ballast for two...Ch. 7 - Can an incandescent lamp dimmer be used to control...Ch. 7 - A good rule-of-thumb to estimate the expected life...Ch. 7 - A post light has a 120-volt, 60-watt lamp...Ch. 7 - Define the following terms. a. A tap conductor is...Ch. 7 - Circle the correct answer for the following...Ch. 7 - Circle the correct answer for the following...
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- 12. Which Insulators can be used for both horizontal and vertical positioning? A. SUSPENSION TYPE INSULATORS B. SHACKLE TYPE INSULATORS C. PIN TYPE INSULATORS D. POST TYPE INSULATORSarrow_forward14: In a natural circulation solar water heater, collector has a glass cover on the top and an ________________ material at the bottom. a. Insulating b. Sheets c. Steel d. Tubes 15: text ____________ wind mill consists of narrow rims and wire spokes. a. Single bladed b. Vertical Axis c. Double bladed d. Multibladedarrow_forward21/ Which Insulators can be used for both horizontal and vertical positioning? A. PIN TYPE INSULATORS B. SHACKLE TYPE INSULATORS C. SUSPENSION TYPE INSULATORS D. POST TYPE INSULATORSarrow_forward
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