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Electrical Installation Guide

The document contains 4 tables that provide the current-carrying capacities in amperes for different sizes of copper and aluminum conductors installed using various methods, under different ambient temperature and insulation conditions. The tables give the allowable ampacities for 1-5 loaded conductors based on the conductor material and size.

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Huynh Ngoc Nghia
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337 views14 pages

Electrical Installation Guide

The document contains 4 tables that provide the current-carrying capacities in amperes for different sizes of copper and aluminum conductors installed using various methods, under different ambient temperature and insulation conditions. The tables give the allowable ampacities for 1-5 loaded conductors based on the conductor material and size.

Uploaded by

Huynh Ngoc Nghia
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLS, PDF, TXT or read online on Scribd
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Table A.

52-2 (52-C1) Current-carrying capacities in amperes


for methods of installation in table A.52-1 (52-B1)
PVC insulation/two loaded conductors/copper or aluminium
Conductor temperature: 70 C/Ambient temperature: 30 C in air, 20 C in ground

Nominal cross- Installation methods of table A.52-1


sectional area of
conductor mm2 A1 A2 B1 B2 C D

1 2 3 4 5 6 7
Copper
1,5 14,5 14 17,5 16,5 19,5 22
2,5 19,5 18,5 24 23 27 29
4 26 25 32 30 36 38
6 34 32 41 38 46 47
10 46 43 57 52 63 63
16 61 57 76 69 85 81
25 80 75 101 90 112 104
35 99 92 125 111 138 125
50 119 110 151 133 168 148
70 151 139 192 168 213 183
95 182 167 232 201 258 216
120 210 192 269 232 299 246
150 240 219 - - 344 278
185 273 248 - - 392 312
240 321 291 - - 461 361
300 367 334 - - 530 408
Aluminium
2,5 15 14,5 18,5 17,5 21 22
4 20 19,5 25 24 28 29
6 26 25 32 30 36 36
10 36 33 44 41 49 48
16 48 44 60 54 66 62
25 63 58 79 71 83 80
35 77 71 97 86 103 96
50 93 86 118 104 125 113
70 118 108 150 131 160 140
95 142 130 181 157 195 166
120 164 150 210 181 226 189
150 189 172 - - 261 213
185 215 195 - - 298 240
240 252 229 - - 352 277
300 289 263 - - 406 313
Table A.52-3 (52-C2) Current-carrying capacities in amperes
for methods of installation in table A.52-1 (52-B1)
XLPE or EPR insulation/two loaded conductors/copper or aluminium
Conductor temperature: 90 C/Ambient temperature: 30 C in air, 20 C in ground

Nominal cross- Installation methods of table A.52-1


sectional area of
conductor mm2 A1 A2 B1 B2 C D

1 2 3 4 5 6 7
Copper
1,5 19 18,5 23 22 24 26
2,5 26 25 31 30 33 34
4 35 33 42 40 45 44
6 45 42 54 51 58 56
10 61 57 75 69 80 73
16 81 76 100 91 107 95
25 106 99 133 119 138 121
35 131 121 164 146 171 146
50 158 145 198 175 209 173
70 200 183 253 221 269 213
95 241 220 306 265 328 252
120 278 253 354 305 382 287
150 318 290 - - 441 324
185 362 329 - - 506 363
240 424 386 - - 599 419
300 486 442 - - 693 474
Aluminium
2,5 20 19,5 25 23 26 26
4 27 26 33 31 35 34
6 35 33 43 40 45 42
10 48 45 59 54 62 56
16 64 60 79 72 84 73
25 84 78 105 94 101 93
35 103 96 130 115 126 112
50 125 115 157 138 154 132
70 158 145 200 175 198 163
95 191 175 242 210 241 193
120 220 201 281 242 280 220
150 253 230 - - 324 249
185 288 262 - - 371 279
240 338 307 - - 439 322
300 387 352 - - 508 364
Table A.52-4 (52-C3) Current-carrying capacities in amperes
for methods of installation in table A.52-1 (52-B1)
PVC insulation/three loaded conductors/copper or aluminium
Conductor temperature: 70 C/Ambient temperature: 30 C in air, 20 C in ground

Nominal cross- Installation methods of table A.52-1


sectional area of
conductor mm2 A1 A2 B1 B2 C D

1 2 3 4 5 6 7
Copper
1,5 13,5 13 15,5 15 17,5 18
2,5 18 17,5 21 20 24 24
4 24 23 28 27 32 31
6 31 29 36 34 41 39
10 42 39 50 46 57 52
16 56 52 68 62 76 67
25 73 68 89 80 96 86
35 89 83 110 99 119 103
50 108 99 134 118 144 122
70 136 125 171 149 184 151
95 164 150 207 179 223 179
120 188 172 239 206 259 203
150 216 196 - - 299 230
185 245 223 - - 341 258
240 286 261 - - 403 297
300 328 298 - - 464 336
Aluminium
2,5 14 13,5 16,5 15,5 18,5 18,5
4 18,5 17,5 22 21 25 24
6 24 23 28 27 32 30
10 32 31 39 36 44 40
16 43 41 53 48 59 52
25 57 53 70 62 73 66
35 70 65 86 77 90 80
50 84 78 104 92 110 94
70 107 98 133 116 140 117
95 129 118 161 139 170 138
120 149 135 186 160 197 157
150 170 155 - - 227 178
185 194 176 - - 259 200
240 227 207 - - 305 230
300 261 237 - - 351 260
Table A.52-5 (52-C4) Current-carrying capacities in amperes
for methods of installation in table A.52-1 (52-B1)
XLPE or EPR insulation/three loaded conductors/copper or aluminium
Conductor temperature: 90 C/Ambient temperature: 30 C in air, 20 C in ground

Nominal cross- Installation methods of table A.52-1


sectional area of
conductor mm2 A1 A2 B1 B2 C D

1 2 3 4 5 6 7
Copper
1,5 17 16,5 20 19,5 22 22
2,5 23 22 28 26 30 29
4 31 30 37 35 40 37
6 40 38 48 44 52 46
10 54 51 66 60 71 61
16 73 68 88 80 96 79
25 95 89 117 105 119 101
35 117 109 144 128 147 122
50 141 130 175 154 179 144
70 179 164 222 194 229 178
95 216 197 269 233 278 211
120 249 227 312 268 322 240
150 285 259 - - 371 271
185 324 295 - - 424 304
240 380 346 - - 500 351
300 435 396 - - 576 396
Aluminium
2,5 19 18 22 21 24 22
4 25 24 29 28 32 29
6 32 31 38 35 41 36
10 44 41 52 48 57 47
16 58 55 71 64 76 61
25 76 71 93 84 90 78
35 94 87 116 103 112 94
50 113 104 140 124 136 112
70 142 131 179 156 174 138
95 171 157 217 188 211 164
120 197 180 251 216 245 186
150 226 206 - - 283 210
185 256 233 - - 323 236
240 300 273 - - 382 272
300 344 313 - - 440 308
Table A.52-2 (52-C1) Current-carrying capacities in amperes
for methods of installation in table A.52-1 (52-B1)
PVC insulation/two loaded conductors/copper or aluminium
Conductor temperature: 70 C/Ambient temperature: 30 C in air, 20 C in ground

Nominal cross- Installation methods of table A.52-1


sectional area of
conductor mm2 A1 A2 B1 B2 C D

1 2 3 4 5 6 7
Copper
1,5 14,5 14 17,5 16,5 19,5 22
2,5 19,5 18,5 24 23 27 29
4 26 25 32 30 36 38
6 34 32 41 38 46 47
10 46 43 57 52 63 63
16 61 57 76 69 85 81
25 80 75 101 90 112 104
35 99 92 125 111 138 125
50 119 110 151 133 168 148
70 151 139 192 168 213 183
95 182 167 232 201 258 216
120 210 192 269 232 299 246
150 240 219 - - 344 278
185 273 248 - - 392 312
240 321 291 - - 461 361
300 367 334 - - 530 408
Aluminium
2,5 15 14,5 18,5 17,5 21 22
4 20 19,5 25 24 28 29
6 26 25 32 30 36 36
10 36 33 44 41 49 48
16 48 44 60 54 66 62
25 63 58 79 71 83 80
35 77 71 97 86 103 96
50 93 86 118 104 125 113
70 118 108 150 131 160 140
95 142 130 181 157 195 166
120 164 150 210 181 226 189
150 189 172 - - 261 213
185 215 195 - - 298 240
240 252 229 - - 352 277
300 289 263 - - 406 313

Copper
1,5 19 18,5 23 22 24 26
2,5 26 25 31 30 33 34
4 35 33 42 40 45 44
6 45 42 54 51 58 56
10 61 57 75 69 80 73
16 81 76 100 91 107 95
25 106 99 133 119 138 121
35 131 121 164 146 171 146
50 158 145 198 175 209 173
70 200 183 253 221 269 213
95 241 220 306 265 328 252
120 278 253 354 305 382 287
150 318 290 - - 441 324
185 362 329 - - 506 363
240 424 386 - - 599 419
300 486 442 - - 693 474
Aluminium
2,5 20 19,5 25 23 26 26
4 27 26 33 31 35 34
6 35 33 43 40 45 42
10 48 45 59 54 62 56
16 64 60 79 72 84 73
25 84 78 105 94 101 93
35 103 96 130 115 126 112
50 125 115 157 138 154 132
70 158 145 200 175 198 163
95 191 175 242 210 241 193
120 220 201 281 242 280 220
150 253 230 - - 324 249
185 288 262 - - 371 279
240 338 307 - - 439 322
300 387 352 - - 508 364
Copper
1,5 13,5 13 15,5 15 17,5 18
2,5 18 17,5 21 20 24 24
4 24 23 28 27 32 31
6 31 29 36 34 41 39
10 42 39 50 46 57 52
16 56 52 68 62 76 67
25 73 68 89 80 96 86
35 89 83 110 99 119 103
50 108 99 134 118 144 122
70 136 125 171 149 184 151
95 164 150 207 179 223 179
120 188 172 239 206 259 203
150 216 196 - - 299 230
185 245 223 - - 341 258
240 286 261 - - 403 297
300 328 298 - - 464 336
Aluminium
2,5 14 13,5 16,5 15,5 18,5 18,5
4 18,5 17,5 22 21 25 24
6 24 23 28 27 32 30
10 32 31 39 36 44 40
16 43 41 53 48 59 52
25 57 53 70 62 73 66
35 70 65 86 77 90 80
50 84 78 104 92 110 94
70 107 98 133 116 140 117
95 129 118 161 139 170 138
120 149 135 186 160 197 157
150 170 155 - - 227 178
185 194 176 - - 259 200
240 227 207 - - 305 230
300 261 237 - - 351 260
Copper
1,5 17 16,5 20 19,5 22 22
2,5 23 22 28 26 30 29
4 31 30 37 35 40 37
6 40 38 48 44 52 46
10 54 51 66 60 71 61
16 73 68 88 80 96 79
25 95 89 117 105 119 101
35 117 109 144 128 147 122
50 141 130 175 154 179 144
70 179 164 222 194 229 178
95 216 197 269 233 278 211
120 249 227 312 268 322 240
150 285 259 - - 371 271
185 324 295 - - 424 304
240 380 346 - - 500 351
300 435 396 - - 576 396
Aluminium
2,5 19 18 22 21 24 22
4 25 24 29 28 32 29
6 32 31 38 35 41 36
10 44 41 52 48 57 47
16 58 55 71 64 76 61
25 76 71 93 84 90 78
35 94 87 116 103 112 94
50 113 104 140 124 136 112
70 142 131 179 156 174 138
95 171 157 217 188 211 164
120 197 180 251 216 245 186
150 226 206 - - 283 210
185 256 233 - - 323 236
240 300 273 - - 382 272
300 344 313 - - 440 308
Table A.52-2 (52-C1) Current-carrying capacities in amperes
for methods of installation in table A.52-1 (52-B1)
PVC insulation/two loaded conductors/copper or aluminium
Conductor temperature: 70 C/Ambient temperature: 30 C in air, 20 C in ground

Nominal cross- Installation methods of table A.52-1


sectional area of
conductor mm2 A1 A2 B1 B2 C D
1 2 3 4 5 6 7
Copper
1,5 14,5 14 17,5 16,5 19,5 22
2,5 19,5 18,5 24 23 27 29
4 26 25 32 30 36 38
6 34 32 41 38 46 47
10 46 43 57 52 63 63
16 61 57 76 69 85 81
25 80 75 101 90 112 104
35 99 92 125 111 138 125
50 119 110 151 133 168 148
70 151 139 192 168 213 183
95 182 167 232 201 258 216
120 210 192 269 232 299 246
150 240 219 - - 344 278
185 273 248 - - 392 312
240 321 291 - - 461 361
300 367 334 - - 530 408
Aluminium
2,5 15 14,5 18,5 17,5 21 22
4 20 19,5 25 24 28 29
6 26 25 32 30 36 36
10 36 33 44 41 49 48
16 48 44 60 54 66 62
25 63 58 79 71 83 80
35 77 71 97 86 103 96
50 93 86 118 104 125 113
70 118 108 150 131 160 140
95 142 130 181 157 195 166
120 164 150 210 181 226 189
150 189 172 - - 261 213
185 215 195 - - 298 240
240 252 229 - - 352 277
300 289 263 - - 406 313

Copper
1,5 19 18,5 23 22 24 26
2,5 26 25 31 30 33 34
4 35 33 42 40 45 44
6 45 42 54 51 58 56
10 61 57 75 69 80 73
16 81 76 100 91 107 95
25 106 99 133 119 138 121
35 131 121 164 146 171 146
50 158 145 198 175 209 173
70 200 183 253 221 269 213
95 241 220 306 265 328 252
120 278 253 354 305 382 287
150 318 290 - - 441 324
185 362 329 - - 506 363
240 424 386 - - 599 419
300 486 442 - - 693 474
Aluminium
2,5 20 19,5 25 23 26 26
4 27 26 33 31 35 34
6 35 33 43 40 45 42
10 48 45 59 54 62 56
16 64 60 79 72 84 73
25 84 78 105 94 101 93
35 103 96 130 115 126 112
50 125 115 157 138 154 132
70 158 145 200 175 198 163
95 191 175 242 210 241 193
120 220 201 281 242 280 220
150 253 230 - - 324 249
185 288 262 - - 371 279
240 338 307 - - 439 322
300 387 352 - - 508 364
Copper
1,5 13,5 13 15,5 15 17,5 18
2,5 18 17,5 21 20 24 24
4 24 23 28 27 32 31
6 31 29 36 34 41 39
10 42 39 50 46 57 52
16 56 52 68 62 76 67
25 73 68 89 80 96 86
35 89 83 110 99 119 103
50 108 99 134 118 144 122
70 136 125 171 149 184 151
95 164 150 207 179 223 179
120 188 172 239 206 259 203
150 216 196 - - 299 230
185 245 223 - - 341 258
240 286 261 - - 403 297
300 328 298 - - 464 336
Aluminium
2,5 14 13,5 16,5 15,5 18,5 18,5
4 18,5 17,5 22 21 25 24
6 24 23 28 27 32 30
10 32 31 39 36 44 40
16 43 41 53 48 59 52
25 57 53 70 62 73 66
35 70 65 86 77 90 80
50 84 78 104 92 110 94
70 107 98 133 116 140 117
95 129 118 161 139 170 138
120 149 135 186 160 197 157
150 170 155 - - 227 178
185 194 176 - - 259 200
240 227 207 - - 305 230
300 261 237 - - 351 260
Copper
1,5 17 16,5 20 19,5 22 22
2,5 23 22 28 26 30 29
4 31 30 37 35 40 37
6 40 38 48 44 52 46
10 54 51 66 60 71 61
16 73 68 88 80 96 79
25 95 89 117 105 119 101
35 117 109 144 128 147 122
50 141 130 175 154 179 144
70 179 164 222 194 229 178
95 216 197 269 233 278 211
120 249 227 312 268 322 240
150 285 259 - - 371 271
185 324 295 - - 424 304
240 380 346 - - 500 351
300 435 396 - - 576 396
Aluminium
2,5 19 18 22 21 24 22
4 25 24 29 28 32 29
6 32 31 38 35 41 36
10 44 41 52 48 57 47
16 58 55 71 64 76 61
25 76 71 93 84 90 78
35 94 87 116 103 112 94
50 113 104 140 124 136 112
70 142 131 179 156 174 138
95 171 157 217 188 211 164
120 197 180 251 216 245 186
150 226 206 - - 283 210
185 256 233 - - 323 236
240 300 273 - - 382 272
300 344 313 - - 440 308
Number and arrangement of conductors for method C of table A.52-1
Nominal cross-
sectional area of Three loaded conductors
conductor Two loaded conductors
mm2 twin or single-code Multi-core or single-core in
trefoil formation
1 2 3
500V
1,5 23 19
2,5 31 26
4 40 35
750 V
1,5 25 21
2,5 34 28
4 45 37
6 57 48
10 77 65
16 102 86
25 133 112
35 163 137
50 202 169
70 247 207
95 296 249
120 340 286
150 388 327
185 440 371
240 514 434
500V
1,5 28 24
2,5 38 33
4 51 44
750 V
1,5 31 26
2,5 42 35
4 55 47
6 70 59
10 96 81
16 127 107
25 166 140
35 203 171
50 251 212
70 307 260
95 369 312
120 424 359
150 485 410
185 550 465
240 643 544
ors for method C of table A.52-1
Three loaded conductors

single-core in flat formation

21
29
38

23
31
41
52
70
92
120
147
181
221
264
303
346
392
457

27
36
47

30
41
53
67
91
119
154
187
230
280
334
383
435
492
572

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