Chapter A General rules of electrical installation design

More documents

Recommendations

Info

F1 © Schneider Electric - all rights reserved F - Protection against electric shock 2.5 m Electrical apparatus Fig. F24 : Protection by out-of arm’s reach arrangements and the interposition of non-conducting obstacles Earth-free equipotential chambers are associated with particular installations (laboratories, etc.) and give rise to a number of practical installation difficulties > 2 m (1) Extraneous conductive parts entering (or leaving) the equipotential space (such as water pipes, etc.) must be encased in suitable insulating material and excluded from the equipotential network, since such parts are likely to be bonded to protective (earthed) conductors elsewhere in the installation. 3 Protection against indirect contact b The placing of equipment and obstacles must be such that simultaneous contact with two exposed-conductive-parts or with an exposed conductive-part and an extraneous-conductive-part by an individual person is not possible. b No exposed protective conductor must be introduced into the chamber concerned. b Entrances to the chamber must be arranged so that persons entering are not at risk, e.g. a person standing on a conducting floor outside the chamber must not be able to reach through the doorway to touch an exposed-conductive-part, such as a lighting switch mounted in an industrial-type cast-iron conduit box, for example. Insulated floor Electrical apparatus Insulated obstacles Earth-free equipotential chambers In this scheme, all exposed-conductive-parts, including the floor (1) are bonded by suitably large conductors, such that no significant difference of potential can exist between any two points. A failure of insulation between a live conductor and the metal envelope of an appliance will result in the whole “cage” being raised to phaseto-earth voltage, but no fault current will flow. In such conditions, a person entering the chamber would be at risk (since he/she would be stepping on to a live floor). Suitable precautions must be taken to protect personnel from this danger (e.g. nonconducting floor at entrances, etc.). Special protective devices are also necessary to detect insulation failure, in the absence of significant fault current. M Schneider Electric - Electrical installation guide 2008 < 2 m Insulating material Electrical apparatus Conductive floor Insulated walls Fig. F25 : Equipotential bonding of all exposed-conductive-parts simultaneously accessible
F - Protection against electric shock RCDs are very effective devices to provide protection against fire risk due to insulation fault because they can detect leakage current (ex : 300 mA) wich are too low for the other protections, but sufficient to cause a fire Beginning of fire Fig. F26 : Origin of fires in buildings Id
Page 1:
2008 http://theguide.schneider-elec
Page 4 and 5:
Guiding tools for more efficiency i
Page 6 and 7:
General rules of electrical install
Page 8 and 9:
J K L M N P Q General contents Prot
Page 10 and 11:
© Schneider Electric - all rights
Page 12 and 13:
Page 14 and 15:
Page 16 and 17:
Page 18 and 19:
A10 © Schneider Electric - all rig
Page 20 and 21:
Page 22 and 23:
Page 24 and 25:
Page 26 and 27:
Page 28 and 29:
Page 30 and 31:
Page 32 and 33:
Page 34 and 35:
Page 36 and 37:
Page 38 and 39:
B 0 © Schneider Electric - all rig
Page 40 and 41:
B 2 © Schneider Electric - all rig
Page 42 and 43:
B14 © Schneider Electric - all rig
Page 44 and 45:
Page 46 and 47:
Page 48 and 49:
Page 50 and 51:
Page 52 and 53:
Page 54 and 55:
Page 56 and 57:
Page 58 and 59:
Page 60 and 61:
Page 62 and 63:
Page 64 and 65:
Page 66 and 67:
Page 68 and 69:
Page 70 and 71:
Page 72 and 73:
Page 74 and 75:
Page 76 and 77:
Page 78 and 79:
C 0 © Schneider Electric - all rig
Page 80 and 81:
C 2 © Schneider Electric - all rig
Page 82 and 83:
C © Schneider Electric - all right
Page 84 and 85:
C16 © Schneider Electric - all rig
Page 87 and 88:
2 3 4 5 6 7 8 Chapter D MV & LV arc
Page 89 and 90:
D - MV & LV architecture selection
Page 91 and 92:
Page 93 and 94:
Page 95 and 96:
Page 97 and 98:
Page 99 and 100:
Page 101 and 102:
Page 103 and 104:
Page 105 and 106:
Page 107 and 108:
Page 109 and 110:
Page 111 and 112:
Page 113 and 114:
Page 115 and 116: D - MV & LV architecture selection
Page 121 and 122: 2 3 Chapter E LV Distribution Conte
Page 123 and 124: E - Distribution in low-voltage ins
Page 149: E - Distribution in low-voltage ins
Page 152 and 153: © Schneider Electric - all rights
Page 160 and 161: F10 © Schneider Electric - all rig
Page 202 and 203: G10 © Schneider Electric - all rig
Page 216 and 217:
G24 © Schneider Electric - all rig
Page 218 and 219:
Page 220 and 221:
Page 222 and 223:
Page 224 and 225:
Page 226 and 227:
Page 228 and 229:
Page 230 and 231:
Page 232 and 233:
Page 234 and 235:
Page 236 and 237:
Page 238 and 239:
Page 240 and 241:
Page 243 and 244:
2 3 4 Chapter H LV switchgear: func
Page 245 and 246:
H - LV switchgear: functions & sele
Page 247 and 248:
Page 249 and 250:
Page 251 and 252:
Page 253 and 254:
Page 255 and 256:
Page 257 and 258:
Page 259 and 260:
Page 261 and 262:
Page 263 and 264:
Page 265 and 266:
Page 267 and 268:
Page 269 and 270:
Page 271 and 272:
2 3 4 Chapter J Protection against
Page 273 and 274:
J - Protection against voltage surg
Page 275 and 276:
Page 277 and 278:
Page 279 and 280:
Page 281 and 282:
Page 283 and 284:
Page 285 and 286:
Page 287 and 288:
Page 289 and 290:
Page 291 and 292:
Page 293 and 294:
Page 295:
Page 298 and 299:
Page 300 and 301:
Page 302 and 303:
Page 304 and 305:
Page 306 and 307:
K10 © Schneider Electric - all rig
Page 308 and 309:
Page 310 and 311:
Page 312 and 313:
Page 314 and 315:
Page 316 and 317:
Page 318 and 319:
Page 320 and 321:
Page 322 and 323:
Page 324 and 325:
Page 326 and 327:
Page 328 and 329:
L10 © Schneider Electric - all rig
Page 330 and 331:
Page 332 and 333:
Page 334 and 335:
Page 336 and 337:
Page 338 and 339:
Page 340 and 341:
Page 342 and 343:
Page 344 and 345:
Page 346 and 347:
Page 348 and 349:
Page 350 and 351:
Page 352 and 353:
Page 354 and 355:
M10 © Schneider Electric - all rig
Page 356 and 357:
Page 358 and 359:
Page 360 and 361:
Page 362 and 363:
Page 364 and 365:
Page 366 and 367:
N28 © Schneider Electric - all rig
Page 368 and 369:
Page 370 and 371:
Page 372 and 373:
Page 374 and 375:
Page 376 and 377:
Page 378 and 379:
Page 380 and 381:
Page 382 and 383:
Page 384 and 385:
Page 386 and 387:
Page 388 and 389:
Page 390 and 391:
Page 392 and 393:
Page 394 and 395:
Page 396 and 397:
Page 398 and 399:
Page 400 and 401:
P10 © Schneider Electric - all rig
Page 402 and 403:
P12 © Schneider Electric - all rig
Page 405 and 406:
2 3 4 5 Chapter Q EMC guidelines Co
Page 407 and 408:
Q - EMC guidelines 2 Earthing princ
Page 409 and 410:
Q - EMC guidelines 3 Implementation
Page 411 and 412:
Page 413 and 414:
Page 415 and 416:
Q - EMC guidelines Fig. Q15 : Imple
Page 417 and 418:
Q - EMC guidelines Fig. Q17b : The
Page 419 and 420:
Q - EMC guidelines 4 Coupling mecha
Page 421 and 422:
Q - EMC guidelines Source Metal shi
Page 423 and 424:
Q - EMC guidelines 4 Coupling mecha
Page 425 and 426:
Q - EMC guidelines Power + analogue
Page 427:
Schneider Electric Industries SAS H
show all

Chapter A General rules of electrical installation design

Create successful ePaper yourself

Delete template?

Save as template?