Index

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A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Z

N National Electric Code (NEC), USA, 613 National Electrical Manufacturers Association (NEMA), 23-24, 43-44, 47 National Energy Policies, 32 natural cooling, 1081-82 natural frequency of vibration, 518-19 negative phase sequence impedances, 399, 765 NEMA see National Electrical Manufacturers Association networks, harmonics, 846-51, see also harmonics noise pollution, see diesel generators,

nomograms for minimum conductor size, 1001-02 non-continuous enclosures, 1072-75 non-conventional bus systems - see bus systems neutral couplers, 979 neutral grounding reactors, 979 neutral grounding systems, 766-67 neutral grounding transformer, 770-71, 790 new generation current measuring devices, 569 new voltage systems (IEC 60038), xxv-vi no load tests, 305-06 no-load performance, 17

no-load start-up motor heating, 50 noise motors, 197-98, 209, 300-01, 580-81 non-conventional methods current measurement, see current measurement, see current transformers non-ferrous component pre-treatment, 467 non-isolated phase bus systems, 1025-36 non-periodic duties, 69 non-periodic duty, induction motors, 69 non-segregated phase bus systems, 985 non-sparking motors, 202 nozzle testing, 311 NTC thermistors, 347