Grieve Corporation OTN User Manual

ONE-TIME

OT/OTN/OTS CLASS K-5

FOR versatility and economy, THESE
GENERAL PURPOSE FUSES ARE HARD TO
BEAT

OT, OTN and OTS general purpose fuses provide
low cost protection for feeder and branch circuits
serving lighting, heating, and other non-motor
loads. OT, OTN and OTS fuses will safely interrupt
available short circuit currents up to 50,000
amperes in all ratings.

OT, OTN and OTS fuses are not rejection fuses
– care should be taken to ensure that replacement
fuses do not have lower interrupting ratings than
original fuses.

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HIGHLIGHTS:

Versatile

➤

Lowest cost protection

➤

for circuits serving
non-inductive loads

APPLICATIONS:

Feeders

➤

Branch Circuits

➤

Resistive Heating

➤

Residential and Small

➤

Commercial
Installations

OTN 15 through 60 satisfy the Canadian electrical
code requirement for Type “P,” low melting-point,
non-time delay fuses.

Features/Benefits

Easy to read imprint label for quick recognition and

➤

replacement
Low cost for high protection value

➤

Ratings

OT

➤

AC: 1 to 600A
250VAC, 50kA I.R.

DC: 1 to 600A
250VDC, 20kA I.R.

OTN (Canada)

➤

AC: 15 to 60A
250VAC, 50kA I.R.

OTS

➤

AC: 1 to 600A
600VAC, 50kA I.R.
DC: 1 to 600A
300VDC, 20kA I.R.

Approvals

UL Listed to Standard

➤

248-9 File E2137

CSA Certified to

➤

Standard C22.2
No. 248.9*

Ferraz Shawmut Certified

➤

for DC per UL248

*The Canadian Electrical
Code requires these fuses in
ratings 15 through 60A to be of
the low melting point design use
OTN 15-60.

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ONE-TIME

GENERAL PURPOSE/CLASS K-5 FUSES OT/OTN/OTS

Standard Fuse Ampere Ratings, Catalog Numbers

Ampere Catalog Number Ampere Catalog Number Ampere Catalog Number

Rating 250V 600V Rating 250V 600V Rating 250V 600V

1 OT1 OTS1 30 OT30, OTN30* OTS30 125 OT125 OTS125
2 OT2 OTS2 35 OT35, OTN35* OTS35 150 OT150 OTS150
3 OT3 OTS3 40 OT40, OTN40* OTS40 175 OT175 OTS175
4 OT4 OTS4 45 OT45, OTN45* OTS45 200 OT200 OTS200

5 OT5 OTS5 50 OT50, OTN 50* OTS50 225 OT225 OTS225
6 OT6 OTS6 60 OT60, OTN60* OTS60 250 OT250 OTS250
7 OT7 – 65 OT65 – 300 OT300 OTS300
8 OT8 OTS8 70 OT70 OTS70 350 OT350 OTS350

10 OT10 OTS10 75 OT75 OTS75 400 OT400 OTS400
12 OT12 OTS12 80 OT80 OTS80 450 OT450 OTS450
15 OT15, OTN15* OTS15 90 OT90 OTS90 500 OT500 OTS500
20 OT20, OTN20* OTS20 100 OT100 OTS100 600 OT600 0TS600
25 OT25, OTN 25* OTS25 110 OT110 OTS110

* In Canada

Recommended Fuse Blocks With Box
Connectors For One-Time Class K-5 Fuses

Fuse Catalog Number

Ampere 250V 600V

0-60A

61-600A

Rating 1 Pole 3 pole 1 pole 3 pole

0-30 20306 20308 60306 60308

31-60 20606 20608 60606 60608
61-100 21036 21038 61036 61038
101-200 22001 22003 62001 62003
201-400 24001 24003 64001 64003
401-600 2631 2633 6631 6633

A variety of pole configurations and termination provi­sions are available. Refer to the fuse block section of this
catalog for details.

Dimensions

AMPERE A B C D E

RATING In. mm In. mm In. mm In. mm In. mm

250V-OT, OTN FUSES
0-30 2 51 9/16 14 - - - - - -
31-60 3 76 13/16 21 - - - - - -
61-100 5-7/8 149 1-1/16 27 1/8 3 3/4 19 1 25
101-200 7-1/8 181 1-9/16 40 3/16 5 1-1/8 28 1-3/8 35
201-400 8-5/8 219 2-1/16 53 1/4 6 1-5/8 41 1-7/8 48
401-600 10-3/8 264 2-9/16 66 1/4 6 2 51 2-1/4 57

600V-OTS FUSES

0-30 5 127 13/16 21 - - - - - -
31-60 5-1/2 139 1-1/16 27 - - - - - -
61-100 7-7/8 200 1-5/16 34 1/8 3 3/4 19 1 25
101-200 9-5/8 244 1-13/16 46 3/16 5 1-1/8 28 1-3/8 35
201-400 11-5/8 295 2-9/16 66 1/4 6 1-5/8 41 1-7/8 48
401-600 13-3/8 340 3-1/8 80 1/4 6 2 51 2-1/4 57

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