Page 286 - Electrical Safety of Low Voltage Systems

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Electrical Safety of Low-Voltage Systems Dr. Massimo A. G. Mitolo

IT grounding system (Cont.):
resonant faults in, 161–163, 162f, 163f
temporary overvoltage in, 206–208, 207f, 208f
usage of, 155–156, 156f
Iuvenalis, 1

J
Joule, James P., 181
Joule effect, 71, 79, 186, 189

K
Khayyam, Omar, 243
Kirchhoff’s voltage law, 160, 260, 274–275, 274f

L
Leakage currents, 255–256, 256f
LEL. See Lower explosive limit
Live parts insulation, 10–11, 11f
Lower explosive limit (LEL), 214

M
Macroshock, 71
Main earthing terminal, 196–197, 197t
Main equipotential bonding (MEB), 110–113, 110f, 143, 144f, 181, 210, 239
Manzoni, Alessandro, 117
Marinas, electrical safety in, 244–246, 244f, 246f
MEB. See Main equipotential bonding
Medical locations, electrical safety in, 254–262
Microshock, 254–255
Millman’s theorem, 278, 279f
Mitigation strategies, in static electricity, 218–219

N
National Electrical Code, 99
Negative exponential distribution, 31
Neutral conductors
in TN systems, 134–135, 134f
in TT systems, 108–109, 108f, 109f
Neutral potential rise, 160
Neutral-protective conductor (PEN), 4, 5f, 132–134, 133f, 134f, 145, 197–198, 197f, 198f
Nonconduction location, protection by, 21–22, 22f

O
Obstacles, protection by, 14–15, 15f
Ohm’s law, 219, 226, 230