Answered: Find the total number of watts (P),…

Find the total number of watts (P), VARS (Q), VA (S), PF, and the current I. Draw the power triangle. Load 1 200 VAR (L) OW Load 3 E = 100 V 290° + Ⓒ Load 2 600 VAR (C) 100 W 0 VAR 300 W

EBK ELECTRICAL WIRING RESIDENTIAL

19th Edition

ISBN:9781337516549

Author:Simmons

Publisher:Simmons

Chapter29: Service-entrance Calculations

Section: Chapter Questions

Problem 6R: What load may be used for an electric range rated at not over 12 kW? (Table 220.55) _____

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Concept explainers

Thermistors

A thermistor is a special type of resistor whose resistance is more temperature-dependent than standard resistors. The resistance of the thermistor decreases with increasing temperature. This is the basic principle of thermistors. This allows the thermistor circuit to detect very small temperature changes that cannot be observed with the Resistance temperature detectors (RTDs) or the thermocouples. Since the resistance of a thermistor is temperature dependent, it can be connected to an electrical circuit to measure body temperature. This high sensitivity to temperature changes makes thermistors very useful for accurately controlling and calibrating temperature measurements. In general, resistance increases with increasing temperature in most metals, but thermistors react negatively.

Question

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Find the total number of watts (P), VARS (Q), VA (S), PF, and the current I. Draw the power triangle.
Load 1
200 VAR (L)
OW
Load 3
E = 100 V 290°
Load 2
600 VAR (C)
100 W
0 VAR
300 W

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