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accepted, must be forwarded for testing before being put on the market :
1. Thoroughly vitrified and glazed porcelain.
On the inside of the cover of The National Code of Rules, as usually printed, are the following recommendations :
The use of wire ways for rendering concealed wiring permanently accessible, is most heartily endorsed and recommended; and this method of accessible concealed construction is advised for general use.
Architects are urged, when drawing plans and specifications, to make provision for the channeling and pocketing of buildings for electric light or power wires, and in specifications for electric gas lighting to require a two-wire circuit, whether the building is to be wired for electric lighting or not, so that no part of the gas fixtures or gas piping be allowed to be used for the gas-lighting circuit.
Car wiring, rules for, 163.
Carbons for arc lamp, plated and
Carrying capacity of wires, 62 ; table
of, 135, 136.
by leakage, 48; in arc lamp, 33. Ceiling-block, fixture, 144; (rosette),
clamps, 97; globes, wire netting Central stations, rules for, 56.
for, 60; of alternating systems,
nating systems, rules for second-
low-potential systems, rules for
interior, 108; of low-potential
systems, rules for outside over-
head, 104; of low-potential sys-
tems, rules for underground, 105.
Conduit, 51, 115, 124; rules for in-
terior, 122; iron-armoured, 127.
Converters, 154; rules for, 153.
Current, 4, 5, 9, 10; alternating, 154;
38; direct, 157 ; heating effect of,
13-18; induced, 155; unit of, 10.
| Cut-out, 75; incandescent lamp auto-
matic, 101; covered,75, 130; double-l closet, 128; length of, 130, 134;
Fuses, rules for safety, 132.
Gas-lighting, rules for electric, 146.
Gauges, 69, 111.
Generators, rules for, 56.
Globes, vapour-tight, 148.
Globes, wire netting around arc-
Ground return wires, 163.
Grounds, 59, 117.
Hand spring-switch for series incan-
descent lamps, 101.
series incandescent lamps, 101.
Heating effect of current, 13-18.
High efficiency, incandescent lamps
High potential, 57; systems, rules
for, 79; systems, rules for interior
conductors of, 86; systems, rules
for outside conductors of, 79.
| Hydraulic analogue, of multiple cir-
cuit, 36; of series circuit, 29.
Incandescent lamp, 17.
Incandescent lamps, in series cir-
cuits, rules for, 101; of high
Induced currents, 155.
144; combination, 131 ; ceiling-Inside wiring of low-potential sys-
Insulating-joint for fixtures, 141.
Insulation, general nature of, 5.
Interior conductors of high-potential | Motors, rules for, 74.
Moulding, 114, 120'rules for, 120.
Multiple-series system, 102.
logue of, 36.
Neutral wire in three-wire system,
Ohm's law, 20, 21.
Opposite polarity, 115.
Outside conductors of high-potential
systems, rules for, 79; of low-
potential systems, rules for, 104.
arc, 95; of high efficiency, incan- Plated and plain carbons for arc
base frames, 58; troubles from, Polarity, opposite, 115.
Power-stations, rules for street-rail-
ductors, loss of, 13–19; of series
circuit, 31 ; unit of, 10.
ductors, rules for, 109; inside Primary coil, 155.
Railway return circuit, 166.
Railways, rules for electric, 160.
Rate of work, 32.
66; boxes and equalizers, rules
for, 66; boxes, rules for motor, 75;
75, 79; service-switch, 93. | Resistances, arc lamp, 145.