Installation Guide

Double throw switches
Standards and ratings
• UL Listed under file #E4776
• Meets UL98 for switches and UL50
for enclosures
• Meets federal spec WS865C
• Suitable for use as Transfer Equipment
on optional standby systems as defined by
Article 702 of the NEC
• Meets NEMA Standard KS-1 for enclosed switches
• Meets NEC wire bending space requirements
• AIC Ratings
General Duty & 4 Pole Heavy Duty
10,000 AIC when protected by Class H or
100,000 AIC when protected by Class R, J
or T fuses (fuse ampere rating must not exceed
switch ampere rating)
Heavy Duty
10,000 AIC with Class H or 100,000 AIC when
used with or protected by Class R, J or T fuses
(fuse ampere rating must not exceed switch
ampere rating)
1) Typical wiring diagrams for 30-200 amp switches are shown.
2) 100-400A fusible, 3 pole fusible switches (catalog numbers F353SSDTK, F354SSDTK and
F355SSDTK) are also available.
3) 200A, 4 pole stainless Type 4X switch, catalog number NF454SSDTK, is also available.
4) Move load side base.
Fuse capabilities of “DTF” type fusible switches
A mp
rating
Fuse type
H R T J
30 & 60A, 240V Std. Yes (kit) No No
30 & 60A, 600V Std. Yes (kit) No Yes
4)
100 & 200A Std. Std. Yes (kit) Yes
4)
400 & 600A No No Yes
4)
Std.
Fuse capabilities of “F” and “FR” type
fusible switches
A mp and volt
rating
Fuse type
H R T J
100A, 600V Std. — — —
200A, 600V Std. — — —
400A, 240V Std. — — —
400A, 600V — — Std. —
600A, 240V — — Std. —
HNC264
Type 1
Indoor
Type 3R
Outdoor
System
1)
Voltage
Number
of poles Amps
Catalog
number
Catalog
number
Heavy duty fusible
2)
240 Volt AC
or
250 Volt DC
2 200 DTF224 DTF224R
3
30
60
100
200
400
600
DTF321
DTF322
DTF323
DTF324
DTF325
DTF326
DTF321R
DTF322R
DTF323R
DTF324R
FR325DTK
FR326DTK
600 Volt AC,
250 Volt DC
3
30
60
100
200
400
DTF361
DTF362
DTF363
DTF364
DTF365
—
—
DTF363R
DTF364R
FR355DTK
Heavy duty non-fusible
240 Volt AC
or
250 Volt DC
2
30
60
100
200
400
DTNF221
DTNF222
DTNF223
DTNF224
DTNF225
—
—
—
DTNF224R
DTNF225R
3
30
60
100
200
400
600
800
DTNF321
DTNF322
DTNF323
DTNF324
DTNF325
DTNF326
DTNF327
—
—
DTNF323R
DTNF324R
—
—
—
600 Volt AC
or
250 Volt DC
3
30
60
100
200
400
600
800
1200
DTNF361
DTNF362
DTNF363
DTNF364
DTNF365
DTNF366
DTNF367
DTNF368
DTNF361R
DTNF362R
DTNF363R
DTNF364R
DTNF365R
DTNF366R
DTNF367R
DTNF368R
4
3)
30
60
100
200
400
600
800
—
—
—
NF454DTK
NF455DTK
NF456DTK
NF457DTK
NFR451DTK
NFR452DTK
NFR453DTK
NFR454DTK
NFR455DTK
NFR456DTK
NFR457DTK
Heavy duty non-fusible
1)
Type 12/3R
Industrial
Type 4X
Stainless
steel
600 Volt AC,
250 Volt DC
3
30
60
100
200
400
DTNF361J
DTNF362J
DTNF363J
DTNF364J
NF355HDTK
DTNF361S
DTNF362S
DTNF363S
DTNF364S
NF355SSDTK
General duty non-fusible Type 3R – Outdoor
240 Volt AC
or
250 Volt DC
2 100
200
With neutral
DTGNF223NR
DTGNF224NR
Less neutral
DTGNF223R
DTGNF224R
3
100
200
DTGNF323NR
DTGNF324NR
DTGNF323R
DTGNF324R