Index
AC theory, 356
Air-conditioning equipment, calculations for, 69–73 (see also Calculations)
Appliances:
calculations for, 61–66, 94–103 (see also Calculations)
installation of, 288–290 (see also Installation)
Boatyards (see Marinas and boatyards)
Bonding, at services, 22, 223–227, 254
Boxes (see Installation, equipment and devices)
Branch circuits:
calculations for, 42–84 (see also Calculations)
general design rules for, 32–35
installation of, 202–210 (see also Installation)
branch-circuit loads:
air-conditioning equipment, 69–73
appliances, 61–63
calculation techniques, 42
capacitor circuit conductors, 278–281
design summary, 80–83
dwelling units, for, 126–134
lighting and receptacles, 45–50
mixed loads, 74–79
motor loads, 51–60
ranges, commercial occupancies, in, 66
ranges, dwellings, in, 64–66
receptacles, 48
space heating, 67–69
water heaters, 62–64
service and feeder loads:
additional loads in existing dwelling units, optional calculation for, 142–144
appliances, 94–103
computational accuracy of, 138–139
cooking appliances, instructional programs, in, 183
cooking equipment, commercial occupancies, in, 181
design summary, 104–108
dwellings, calculation methods, description of, 126
dwelling unit, optional calculation for, 139–142
dwelling unit, standard calculation for, 135–138
lighting and receptacle loads, 85–89
motor circuits, 91–94
multifamily dwellings, house loads in, 155
multifamily dwellings, optional calculation for, 153–155
multifamily dwellings, special problems in, 159–161
multifamily dwellings, standard calculation for, 151–152
multifamily dwellings, unbalanced loads in, 161
neutral load for lighting circuits, 88–89
parallel conductors, use of, 110–111
power factor, loads with, 115
ranges, electric, 97–103
single-phase ranges on three-phase feeders, 101–103
space-heating equipment, 94
special problems, 110–117
transformers, feeders with, 111–114
transformer circuit protection, 275–278
unbalanced loads on three-phase feeders, 115–117
specific occupancies, examples of:
farm, 184–186
hospital, 187–188
hotels and motels, 182–183
marinas and boatyards, 190–191
mobile homes and mobile home parks, 188–190
multifamily dwelling, comparison of standard and optional calculations for, 156–159
office building, 169–174
office building with warehouse, 174–180
one-family dwelling, optional calculation for, 147–149
one-family dwelling, standard calculation for, 144–147
recreational vehicles and recreational vehicle parks, 190
restaurant, 181–182
school, 183–184
store with show window, 169
two-family dwellings, 155
Capacitors:
circuit conductors for, 278
installation of, 278–281 (see also Installation)
power factor correction, use in, 280, 357–358
theory, 357
Classification, branch circuits, of, 32
Classified locations (see Installation, hazardous locations)
Clearances:
heating cables, of, 292
services, 212–214
signs, 304
swimming pools, over, 309
switchboards, 272–274
working, 269–271
Commercial and industrial occupancies, calculations for, 168–191 (see also Calculations)
Communications circuits, installation of, 344 (see also Installation)
Conductors:
color coding of, 202–203, 238, 240
installation of, 237–246 (see also Installation)
theory, 356
voltage drop on, 360
Cooking equipment, calculations for, 66, 181, 183 (see also Calculations)
DC circuits, theory, 355
Disconnecting means, installation of, 217–218 (see also Installation)
Demand factors (see Feeders)
Dryers, calculations for, 28, 97 (see also Calculations)
Dwelling(s):
branch-circuit installation rules for, 206 (see also Installation)
calculations for, 124–161 (see also Calculations)
classifications, 125
Electrical system, description of, 15–19
Electrical theory, 355–362
Emergency systems, installation of, 340 (see also Installation)
Farm(s), calculations for, 184–186 (see also Calculations)
Feeder(s):
calculations for, 25–31, 84–117, 135–191 (see also Calculations)
demand factors, use of, 28, 97–101 (see also Calculations)
general design rules for, 25–31
installation of, 210–211 (see also Installation)
Formulas, 379–385
Fuses (see Installation, equipment and devices)
Grounding:
equipment, of, 253–254
services, at, 220–223
Ground-fault circuit interrupters, requirements for, 205–206, 209
Hospital(s), calculations for, 187–188 (see also Calculations)
branch-circuit installation in, 210 (see also Installation)
calculations for, 182–183 (see also Calculations)
House loads, example of, 155 (see also Calculations)
Inductors, theory, 357
Industrial occupancies, calculations for, 168–191 (see also Calculations)
Information Technology equipment, 306
appliances, 288–290
bonding, equipment, of, 254–255
boxes containing outlets, receptacles, switches, or devices, 257
branch circuits, 201–210:
branch circuits required in dwelling, 206
color coding of conductors, 202
dwelling units, for, 206–210
ground-fault circuit interrupters, requirements for, 203, 205, 209
lighting outlets required in dwelling, 209
maximum voltage, 207
receptacle outlets required, 207
cabinets, cutout boxes, switches, and lighting fixtures, 261
capacitors, 278–280
clearances, working, 269
communications circuits, 344–345
conductors, 237–246
conduit bodies, pull boxes, and junction boxes, 258–261
data-processing equipment, 306
distribution equipment, 269–281
emergency systems, 340–342
equipment and devices, 255–261
equipment grounding and bonding, 253–255
feeders, 210–211
fire alarms, 344
grounding, equipment, of, 253–254
hazardous locations, 319–333
commercial garages, 329–330
gasoline dispensing and service stations, 331–333
motors, 294–296
overcurrent devices, 256
panelboards, general rules, 274–275
panelboards, lighting and appliance, 274
pools, swimming, 307–312
power limited circuits, 343
remote control circuits, 343–344
services, 211–229:
clearances, 212–214
conductors, 212–217
disconnecting means, 217–218
grounding and bonding, 220–229
grounding electrode, 226–227
grounding electrode conductor, 226–227
grounding of systems and service equipment, 220
miscellaneous circuits and systems, 227–229
overcurrent protective device, 219–220
overhead services, 212–214
signaling circuits, 343
signs, 303–305
space-heating equipment, 291–294
special equipment, 303–312
switchboards, 272–274
transformers, 275–278
utilization equipment, 288–296
wiring methods, 246–252
Lighting, calculations for, 45–50, 85–90 (see also Calculations)
Load(s) (see Calculations)
Maximum and permissible loads, on branch circuits, 34
Marinas and boatyards, calculations for, 190 (see also Calculations)
Motor(s):
calculations for, 51–60, 91–94 (see also Calculations)
installation of, 294–296 (see also Installation)
theory, 361
Mobile home(s), calculations for, 188–190 (see also Calculations)
Mobile home parks, calculations for, 190 (see also Calculations)
Motel (see Hotels and motels)
Multifamily dwellings (see Dwellings and Calculations)
Multiwire branch circuits, 34, 202
National Electrical Code®, 6–9
Nonlinear loads, 89
Office building(s), calculations for, 169–181 (see also Calculations)
Ohm’s law, 355
Optional calculation (see Calculations)
Outlets, required, 204–205, 207–209
Overcurrent protective devices, installation of, 219, 256 (see also Installation)
Panelboards, installation of, 274 (see also Installation)
Power factor, 115, 280, 357–358
Premises wiring system:
calculations for, 124–161 (see also Calculations)
definition of, 16
Ranges, calculations for, 64–66, 97–103 (see also Calculations)
Receptacles:
calculations for, 45–50, 85–89 (see also Calculations)
installation of, 204, 207 (see also Installation)
Recreational vehicles and recreational vehicle parks, calculations for, 190 (see also Calculations)
Remote control circuits, 343–344
Restaurant, 181
Services:
calculations for, 19–24, 84–117 (see also Calculations)
general design rules for, 19–24
installation of, 211–229 (see also Installation)
Signs, installation of, 303 (see also Installation)
Schools, load calculation, 183 (see also Calculations)
Space heating equipment:
calculations for, 67–69, 94 (see also Calculations)
installation of, 291–294 (see also Installation)
Standby system, installation of, 342 (see also Installation)
State and local ordinances, 9
Stores, calculations for, 169 (see also Calculations)
Switchboards, installation of, 272 (see also Installation)
Tankless water heater, 63–64
Temperature ratings, 35
Transformer(s):
high-leg delta, 115
installation of, 275–278 (see also Installation)
theory, 361
underground installations, 245–246
Voltage and volts:
maximum, on branch circuits, 32, 204, 207
voltage drop on conductors, 360
Warehouse(s), calculations for, 176 (see also Calculations)
Wiring methods, 246–252 (see also Installation)
Water heaters, 62–64