make it a
tion of articles
of
particular
value
to
the
practical
proof
against
crosses
or
shorts
Protecting
gas
crews
Operating
bring
up
low
battery
cells
columns
Insulating
and
grounding
extending
through
the
principal
thoroughfare
and
business
section
every
intersecting
street
at
least.
distribution
in.
form was
5-ft.
by
7-ft.
holes
to
support
grade
of
the
improved
street
street
improvement.
In
such
destroyed
all commerical
The friction and
rating
in
amperes.
The
secondary
secondary
ground.
Approximately
60
to
the Denver
good
electrical
In
Fig.
2
is
illustrated
surrounding
a
ground
pipe
or
plate
decreases
distance
of
also
bubble,
seen
in
a
45-deg.
vest
pocket.
A
drawing
of
mile. A
exchanged
for
a
freshly
charged
the
of the
is to
dug
in
frozen
ground.
The
accompanying
WITH
DYNAMITE.
tamped
in
and
ignited,
it
is
made.
All
splices
in
wires
for
conveying
electricity
joint
may
then
be
wrapped
hold
it
in
place.
friction
tape.
Joints
should
always
be
taped
TRANSPOSING WIRES.
Use of
Choke Coils
the
San
Antonio
(Tex.)
Gas &
Electric
of
been
broken,
and
that
the
iron
brackets
the
wooden
cleat
which
supported
them
the
groove
of
the
insulator,
but,
to
remain
and
WITH
BUILDING
slight
buzzing,
caused
by
on
the
line
were
all
grounded
to
the double
kind could
far
put
$10
or
less,
bringing
the
off-peak
schedule
more
lines.
The
algebraic
sum
of
it was decided to
was obtained.
the
other
two
terminals
on
the
other
connector.
loads,
then
deflection
such
current
would
produce,
it
by
temperature
of
75
deg.
Fahr.
X
It will
ammeter
that the shunt
and meter bear
that
recourse
or not
it is
in
change
obtain a
good average
are
so
rapid
that
the
deg. apart.
Diff.
M.V.
FIG.
be
purchased.
No
margin
during
the
period.
Obviously,
for
points
and
on
the
other
end
is
a core which is free to move within the solenoid. The
contact
points
the
energy
used
in
the
relay
switch,
WVW
ywwwv
FIG.
1.
such that the
connected
in
circuit
the
incased
in
pipe,
these
could
be
obtained.
The
arrange-
ment
of
jumpers
for
these
are
covered
clamping
done
as
shown
of
copper
busbars.
As
far
as
possible,
lengths
of
approximately
station
floor
the
time
the
building
is
erected.
It
has,
Company,
St.
Louis,
REMOTE
SWITCHES.
pilot-lamp
long
as
potential
is
on
is
the left. If the
CELL.
Balancer
storage
battery
motor-generator
set.
The
machine
transferred
one
else,
at 110 volts
one row
outside of
great
that
Running
Board
supporting arrangement
to
light
the
sidewalk
and
store
box should be
purpose,
the
sign,
which
should
each
group
side,
indicating
at
reaching
into
In another
to
say
no
fire
the
jar
and
vibration
trans-
mitted
to
the
whole
be
looped
around
loose
many
ways
in
that
some
agreements
had
to
be
and
lamps
are
already
on
the
instruments,
in
which
case
the
multiple
lamp
would
be
extinguished.
The
series
circuit
is
supplied
by
controlled
by
a
double-pole,
double-throw
switch
which
left
the
switch. One test circuit
lamps
are
provided
that
the
above
the
required
switch
closed,
terminal
ground
and
the
ungrounded
lamps
1,
2
or
3,
the
magneto
should
ring
location of
lamps
wall
plate
bookkeeper
or
automatically
at
the
time
the
regular
type.
Fourteen
incandescent
circuits
of
this
type
are
now
in
operation
at
Worcester,
the
load
on
each
varying
from
up
to
length
so
not
in
in
depart-
Test
Lamps
FIG.
1.
three-wire
system,
double-pole
switches
taking
the
place
of
the
single
contacts
indicated.
of
10,500
by
means
sensitiveness of the
which
operates
the
forty
switches
relay
takes
about
0.1
amp.
and
the
operating
magnets
2
amp.
momentarily.
most common.
in industrial
LIGHTING SYSTEM.
can be
the three-wire
a
three-wire
system,
like
that
of
Fig.
7,
were
100
amp.
no electrical
phases
as
outlined
FIG.
11.
AUTO-TRANSFORMER
strips
3/4
in.
wide
are
provided
for
the rest
the
appear-
time as
flow
through
the
defect
into
the
secondary
coils
and
through
the
felt about
the current to
thus
represents
the
current
flowing
in
the
tertiary
winding
the
re-
verses
the
relative
polarity
of
the
coils
in
transformers
ranging
from
5
secondary
necessary
to
oih
V
UUL8JlflMQj
SYSTEMS.
connect
in
parallel
two
transformer
banks
operating
on
transmission
system
 
the combinations
the
SWITCH
LEADS.
use
overhauled
and
converted
up
10,000
amp.
and
ran
on
Alarm Connection
should
be
AROUND
wall has
maintenance.
will
last
as
long
replacement
is
in
favor
of
the
two-piece,
detachable-mechanism
switch.
In
making
re-
placements
damage
done
to
the
surrounding
walls
has
can
be
supplied
by
any
first-class
through
them,
chains
than
to
PORTED
BY
CHANDELIER
LOOP.
In
the
method
shown
in
Fig.
3,
an
ordinary
commercial
pipe
cap
is
drilled
and
tapped,
and
a
piece
of
wrought-iron
rod,
say
of
a
adhered to.
lamp
it.
concrete
filling
is
being
placed
saves
much
time,
wheeling
about
use of which
point
1
1/2-in.
length,
coupling
is
compound
is
required
the
conduit
can
be
pushed
placed
in
position
by
slipping
it
small
diameter
at
box,
properly
and
securely
fastened.
one
length
into
the
form
with
wheelbarrows.
Galvanized
iron
and
steel
conduit
faulty
construction
that
might
occur
in
any
a
been
with a
mitered
for
support-
ing
it
and
for
effecting
the
connection
fireproofing.
Where
stove
bolts
to
chip
these
holes
than
to
drill
for
an
expansion
its entire
Either
water
or
oil
paint
adheres
well
material
may
conductivity
three
straps
fastened
made
have
the
advantage
that
they
insulating
supports.
4.
through
which
the
bushing
passes.
If
mechanical
installed
heading.
Com-
position
mica,
porcelain
or
hard-rubber
sockets
4
knob and a few turns in back of the knob
before
making
the
joint.
There
is,
however,
one
objection
on one wire.
good
would
last
ends
to
a
pair
of
solid
knobs
(figure-eight
fashion);
then
separable
knobs
are
inserted
every
41/2
ft.
When
the
cap
of
ex-
clusively
in
one
plant
for
open
in
this
and under the line wire with three or four turns
on each
wire
with
4
in.
of
tie
inclosed
in
drops
the
joints
should
continu-
ous
conduit
throughout
after
six
shoulder
if
that has
from
terminals
properly,
because
a
loose
fuse
CUT-OUT
BASES.
cut-out
be
unscrewed.
There
is,
however,
a
snap
switch
for
wet
places
on
the
the heat
assists the
time,
a
great
convenience,
especially
when
a
lamp
is
kept
burning
inside
galvanized
cabinet
replaced
steel
cabinet,
if
not
too
large,
It
will
not
corrode,
but
it
the
before
installing
it.
Best
results
have
obtained
by
using
a
silicate
two holes
open
Fig.
deg.
Fahr.
Another
method
of
interrupting
the
system
is
a
glue
house,
and
the
pin
and
insulator
system
using
3-32-in.
rubber-covered
wire,
a
trapped
in
the
conduit
If a
the room and
remedy
is
to
pro-
vide
a
 tee
condulet
bend,
to
like
new,
but all
only
slightly
grounds
are
very
it
up
about
way
indicated
at
development.
The
not
less
than
No.
U.
S.
metal
gage
(0.109
in.
thick)
to
comply
provided
wooden
stringers
can
be
supported
by
building
was
erected.
Floor
/HI
using
the
drill
very
promptly
broken
as
soon
as
strain
was
placed
upon
the
foot
again.
attempt
to take
D
found
very
useful
for
repairing
separate
motor
bearings
and
a
bearing
hot.
are
in
daily
use
to each
piece
induction
motors
is
rest and
the size of the
may
length
is
clamped
motor and driven
taken
out
and
it
these
unexcited.
and the
additional load
would seldom
arranged
in
essentially
ferrules.
The
lug
shown
in
Fig.
4,
which
may
flux.
By
progress-
ing
around
the
fields
with
a
lamp
pole
or
lamp
or
poorly
considerable time
Very
often
case
the
milli-
used on
with
sixty
turns
also be
in
the
accompanying
sketch,
page
252.
Fixed
Resistance
FIG.
1.-
250V.
CONVERTING
550-VOLT
GENERATOR
TO
220-VOLT
SERVICE.
before.
board are disconnect
220-volt,
three-
wire
system
the
neutral
tapped
in
are
person-
ally
(By
H.
Bearnes).
In
wooden
buildings
illustrated
in
Fig.
2.
supports
of
By
this
expedient
any
tend-
ency
for
the
mounting
to
slip
down
the
column
is
corrected.
The
wood
BAR.
Steel
Channel
Stringer
FIG.
14.
CHANNEL-CLAMPING
BARS.
must
be
wooden floor or a
machine
that
the
bolt
head
or
the
nut,
as
of
other
are
low
resistance
path
to
ground
through
the
machine
frame,
will
discharge
from
windings
and
sometimes
cause
break-
downs.
A
metallic
comb,
be effective
Fig.
11.
A
ground
pipes,
which
the
nuts
turn
on
that
is,
that
can
be
readily
bent
into
any
de-
sired
contour.
A
large
round
wire
connect
the
ground
wire
three-wire
circuit,
254
Open
wiring
(See
Conduit,
versus
open
wiring
for
places
subject
to
moisture,
corrosive
fumes,
steam,
etc.,
200