Biddle MEGGER - Page 20

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both

ends

in

order

to

test

the

cable

by

itself,

and

to

avoid

error

due

to

leakage

across

or

through

switchboards

or

panelboards.

See

also

Use

of

Guard

Terminal,

page

32.

**MEGGER"’

INSULATION

TESTER

౬

CONQUCTOR

IOVERED

DISCONNECTED

FIGURE

17.

Testing

a

Single-Conductor

Cable.

7.

Bushings,

Potheads

and

Insulators

**MEGGER™

INSULATION

TESTER

FIGURE

18

The

illustration

shows

use

of

spring

collar

as

a

Guard

con-

nection

to

eliminate

the

effects

of

surface

leakage.

The

device

under

test

must

be

disconnected

from

all

other

equipment.

[18]