1 % range neutral 70 26 % table instantaneous trip motor breaker 800 51 ampacity 12 TW copper 25 76 % gutter fill 20
2 % dryer neutral 70 27 kW demand 1 household range 8 52 ampacity 10 TW copper 30 77 % gutter fill at splice 75
3 % 4 fixed appliances 75 28 kW demand 2 household ranges 11 53 article NEC introduction 90 78 copper amps / sq. inch 1000
4 % continuous load 80 29 kW demand 3 household ranges 14 54 article NEC definitions 100 79 aluminum amps / sq. inch 700
5 va small appliance ckt 1500 30 air gap 1/4 55 table grounding electrode cndr 250.66 80 volts yellow non heating lead 120
6 va laundry ckt 1500 31 seal off compound thickness 5/8 56 table equipment grounding cndr 250.122 81 volts blue non heating leads 208
7 % residential standard demand 35 32 taper on rigid conduit inches / foot 3/4 57 table conductor ampacity 310.16 82 volts red non heating leads 240
8 % residential optional demand 40 33 metal box set back in non combustible in wall 1/4 58 table conductor insulation 310.13 83 volts non heating leads brown 277
9 va commercial receptacle 180 34 metal box set back in combustible wall 0 59 table conductor properties Chapter 9 8 84 volts non heating lead orange 480
10 three phase decimal 1.732 35 % fill 1 wire in raceway 51 60 % motor feeder wire 4 motors all same 425 85 amps when hex head on fuse 15
11 amps subdivided load 48 36 % fill 2 wires in raceway 31 61 % motor feeder wire 3 motors all same 325 86 raceway needs bushing when __ or larger #4
12 va residential dryer 5000 37 % fill 3 or more wires in raceway 40 62 % motor feeder wire 2 motors all same 225 87 cndrs can be identified when __ or larger #4
13 gen light residential va / sq ft 3 38 % fill nipple 60 63 communication cable over roof feet 8 88 box sized on raceway when __ or larger #4
14 va / sq. ft. office rec when unknown 1 39 inches or less length of a nipple 24 64 feet fixture over tub 8 89 k for copper in voltage drop  approx. 12.8
15 va  / sq. ft. office lighting 3 1/2 40 fill cu. in. #14 conductor 2 65 feet fixture over tub 8 90 k for aluminum in voltage drop  approx. 21.7
16 breaker #14 TW copper 15 41 fill cu. in. #12 conductor 2.25 66 drop clearance over residential 9 1/2 91 standard overcurrent devices 240.6
17 breaker #12 TW copper 20 42 fill cu. in. #10 conductor 2.5 67 clearance over residential driveway 11 1/2 92 auto transformer winding 1
18 breaker #10 TW copper 30 43 fill cu. in. #8 conductor 3 68 clearance over roadway 15 1/2 93 straight pull under 600 volts times 8
19 unity power factor 1.0 44 fill cu. in. #6 conductor 5 69 table 1 phase motor flc 430.248 94 pull box distance between raceways under 600 volts times 6
20 1 horsepower output watts 746 45 #14AWG  cm 4110 70 table 3 phase motor flc 430.250 95 angle pull box to opposite wall under 600 volts  times 6
21 % for motor disconnect 115 46 #12 AWG cm 6530 71 % derate 4-6 conductors 80 96 max degrees of bends in raceway from box to box 360
22 % for motor wire 125 47 #10 AWG cm 10380 72 % derate 7-9 conductors 70 97 time of 1 AC cycle in seconds 1/60
23 % table dual element fuse motor 175 48 amps of 100 watt load at 120 volts .8333 73 % derate 10-20 conductors 50 98 AC cycles per second typical 60
24 % table non delay motor fuse 300 49 ohms of 100 watt load at 120 volts 144 74 % derate 21-30 conductors 45 99 receptacles patient bed location 4
25 % table ivt motor breaker 250 50 ampacity 14 TW copper 20 75 how many cm 500kcmil 500,000 100 clearance feet service drop minimum 10

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