What is the table listed ampacity of a #1 AWG THW copper
conductor in a raceway containing no more than three current
carrying conductors, 400C, dry location?
What is the table listed ampacity of a #1 AWG THW copper conductor in a raceway...
10. What is the conductor ampacity required for a 20 KW, 240 volt central space heater? 11. What is the ampacity of three No. 4 THWN conductors installed in an ambient temperature of 30 degree Celsius? 12. What is the ampacity of three No. 3/0 conductors installed in free-air? 13. What is the ampacity of eight 4/O THHN conductors installed a raceway in an ambient temperature of 100 degreee F? 14. What is the ampacity of ten No. 6 THWN...
Ten #3 AWG copper load carrying conductors with type THHW, 75oC insulation are installed in a rigid metal conduit, RMC. What is the final loaded allowable ampacity for each conductor?
O AWG copper conductor without any markings to indicate the The terminal for dh s terminal is assumed to have a minimum terminal temperature rating E. 90°C. 60°C. of: C, D. 75 C. B. 40-С. Code reference re rated branch-circuit supplies fluorescent luminaires (lighting fixtures) with a peres. All terminations are 75°C rated, there are only three current- THHW as shown in Figure 1.43 pe 10. A 20-am carrying conductors in EMT, and the conductor insulation is The minimum size...
1. The color of the outer finish of the insulation or tape marking a grounded conductor must be A. black B. green. C. white or gray D. yellow finish. 2. When the main bonding jumper in a residential el ectrical system is a screw only, the screw must be identified with a A. white B. red C. green D. black The grounding electrode conductor should be installed without a splice, unless the splice is made using exothermic welding or by...
D. trade size 1 1/2 (41). Atrade size 4 (21). B.trade size 1 (27). (53). Ctrade size 1 1/4(35). E. trade size 2 Code reference 29. The general use 125-volt receptacles in a commercial building are supplied by 20- ampere rated multiwire branch-circuits with three ungrounded conductors anda common neutral from a 208/120-volt, 4-wire, 3-phase electrical system. The con ductors for nine circuits are run in a single raceway to an area of the building includ ing nine ungrounded conductors...
1. Transformer with three legs A, B and C in case of homogenous the first leg A has coil with 3 Henry, what is the Henry at leg C a. 0.5 H b. 1 H c. 2 H d. 2.5 H 2. If a carrier wave of 10MHz is amplitude modulated by an audio signal of 1 kHz, the resultant signal to be broadcast contains only the: (A) 10,001,000-Hz component (B) 10,001,000-Hz and 9,999,000-Hz components (C) 10,001,000-Hz, 10,000,000-Hz, and 9,999,000-Hz...
pleas help me in this do any question you know using National Electrical Code 2011 Applied Electricity NEC worksheet t hree Copper conductors with THHN insulation run in Electrical A branch-circuit Consther conductors. The conductor terminations are rated for a maximum ure in the area of this installation is not expected to exceed 30C size 8 AWG, the maximum ampacity of the conductors If the conductors for this circuit are permitted A 40 amperes. B. 50 amperes. to be used...
what information needed? 3. Repeat Example 7.8, using a 100 kVA transformer and #3/0 AWG and #2 AWG cables for the SLs and SDs, respectively Show the procedure to arrive at the following answers (a) 0.72 pu A (b) 0.050 pu V Example 7.8 residential secondary distribution system. Assume that the distribution trans- Figure 7.11 shows former capacity is 75 kVA (use Table 7.1), all secondaries and services are single-phase three wire, nominally 120/240 V, and all SLs are of...
(12 If a conductor is covered, it is: A) Encased with an insulation recognized by the Code 8) Encased with an outer covering not recognized as electrical insulation C) Effectively isolated from ground faults D) Covered with a material of a composition and thickness recognized by UL (13 Open motors with commutators shall material, but this: A) Is only required for over 600 volts B) Does not prohibit these motors from a Class I location C) Shall not prohibit these...
can anyone help me with this test please? I'm struggling with it QUESTION 1 A permanently installed overhead strip light is a ____. a.foot light b.track light c.border light d.head light QUESTION 2 Egress lighting for carnivals, circuses and fairs shall not ____. a.contain metal raceways b.be integrated into a central switchboard c.contain branch circuits d.be protected by a GFCI protection device QUESTION 3 The attachment plug cap in a mobile home shall be a ____, rated 50...