鈥?/div>
3
APPLICATIONS
The National Electric Code now permits Edison-base fuses to
be used only for replacements in existing installations, and
then, only when there is no evidence of overfusing or
tampering. All new Edison-base fuseholders must have Type
S fuse adapters installed before they are placed in service.
Designed to prevent installation of wrong size fuses, Type S
Adapters (SAO series) screw into Edison-base fuseholders so
they may accept Type S fuses. Once installed the adapters
cannot be removed.
To prevent shunting of open fuses or overfusing, and to
reduce nuisance fuse opening, it is recommended that SAO
adapters with properly rated SLO or SOO series fuses be
installed in all Edison-base fuseholders.
HOLDERS
See Littelfuse box cover units in the Miscellaneous Products
section of this catalog.
EDISON-BASE PLUG FUSES
TOO Fuses
are dual-element time-
delay Edison-base fuses designed for
motor and motor branch-circuit
protection; also suitable for all general-
purpose circuits. Use for replacement
purposes only.
WOO Fuses
are non-delay Edison-
base fuses, best suited for incandes-
cent lighting, resistance heating, and
general purpose circuits with no
significant motor load. Not recom-
mended for motor circuits. See TOO
and SOO fuses. Use for replacement
purposes only.
TYPE S PLUG FUSES
SOO Fuses
are dual-element time-
delay Type S fuses designed for motor
and motor branch-circuit protection;
also suitable for all general-purpose
circuits.
AMPERE RATINGS
鈦?/div>
4
3
鈦?/div>
10
4
鈦?/div>
10
1
鈦?/div>
2
6
鈦?/div>
10
8
鈦?/div>
10
1
AMPERE RATINGS
鈦?/div>
4
3
鈦?/div>
10
4
鈦?/div>
10
1
鈦?/div>
2
6
鈦?/div>
10
8
鈦?/div>
10
1
1
1
1
鈦?/div>
8
1
1
鈦?/div>
4
1
4
鈦?/div>
10
1
6
鈦?/div>
10
1
8
鈦?/div>
10
2
2
1
鈦?/div>
4
2
1
鈦?/div>
2
2
8
鈦?/div>
10
3
3
2
鈦?/div>
10
3
1
鈦?/div>
2
4
4
1
鈦?/div>
2
5
5
6
鈦?/div>
10
6
6
1
鈦?/div>
4
7
8
9
10
12
14
15
20
25
30
AMPERE RATINGS
1
鈦?/div>
2
1
2
3
5
6
8
10
15
20
25
30
1
1
1
鈦?/div>
8
1
1
鈦?/div>
4
1
4
鈦?/div>
10
1
6
鈦?/div>
10
1
8
鈦?/div>
10
2
2
1
鈦?/div>
4
2
1
鈦?/div>
2
2
8
鈦?/div>
10
3
3
2
鈦?/div>
10
3
1
鈦?/div>
2
4
4
1
鈦?/div>
2
5
5
6
鈦?/div>
10
6
6
1
鈦?/div>
4
7
8
9
10
12
14
15
20
25
30
TLO Fuses
are medium time-delay
Edison-base fuses designed for
general-purpose branch-circuit
protection. See TOO and SOO fuses
for motor protection. Use for replace-
ment purposes only.
SLO Fuses
are medium time-delay
Type S fuses for general-purpose
branch-circuit protection.
AMPERE RATINGS
15
20
25
30
AMPERE RATINGS
15
20
25
30
46
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