Energy Guide

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3-5
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General Duty—Up to 100 kA Short Circuit
Current Rating
General Duty Safety Switches
Class 3130 / Refer to Catalog 3100CT1602
240 Volt—Single Throw Non-Fusible Switches
Table 3.3: Non-Fusible
System Amperes
NEMA Type 1 Indoor
NEMA Type 3R
Rainproof [8]
Horsepower Ratings
(Max.)
Cat. No. Cat. No.
1Ø 3Ø
2 Wire (2 Blades)—240 Vac Maximum
30 — DU221RB 3 —
60 — DU222RB 10 —
60
QO260NATS [9] [10] QO200TR [9] [10] [11]
10 —
100
QO2000NS [9] [10] QO2000NRB [9] [11]
20 —
200 Use 3P Switch Use 3P Switch — —
400 Use 3P Switch Use 3P Switch — —
600 Use 3P Switch Use 3P Switch — —
3 Wire (3 Blades)—240 Vac Maximum
30 DU321 DU321RB 3 7-1/2
60 DU322 DU322RB 10 15
100
DU323 [12] DU323RB [12]
15 40
200
DU324 [13] DU324RB [13]
15 60
400 DU325 — — 125
600
DU326 [14]
— — 150
UL Listed Maximum Short Circuit Current Ratings — AC Only
Table 3.4: Fusible Safety Switch Short Circuit Current Rating
Fuse Class
UL Listed Short Circuit Rating
Plug
10 kA
H, K
10 kA
J [15], R
100 kA
T [16]
100 kA
Non-Fusible Safety Switches
Systems equal or less than 10 kAIR SCCR —Any brand of circuit breaker or fuse not
exceeding the ampere rating of the switch may be used in conjunction with a non-fusible
safety switch.
Systems above 10 kAIR SCCR—The UL Listed short circuit current rating for Square D
non-fusible switches is based upon the switch being used in conjunction with fuses or
Square D circuit breakers or Mag-Gard motor circuit protectors.
Table 3.5: Non-Fusible Safety Switch Short Circuit Current Rating
Fuse Class or Circuit Breaker Type [17] UL Listed Short Circuit Rating
Any Brand Circuit Breaker
10 kA
H or J PowerPact Circuit Breaker
Up to 65 kA [18]
H, K
10 kA
J, R
100 kA [19]
T
100 kA [20]
3
SAFETY SWITCHES
[8] Bolt-on hubs—Refer to Hubs, page 3-15.
[9] Enclosed molded case switch—Refer to Section 1.
[10] Includes factory-installed grounding kit.
[11] Not service entrance rated—Refer to Table 3.34 for more information.
[12] If a neutral assembly is required, order and field install SN0610.
[13] If a neutral assembly is required, order and field install a SN20A Neutral Assembly Kit. For a 200% neutral application, order and field install (2) SN20A Neutral Assembly Kits and (1)
SN20NI Neutral Jumper Kit.
[14] If a neutral assembly is required, order and field install D600SN.
[15] Only applicable to 200 A - 600 A except D325NT, D325NTR, D326NT and D326NTR.
[16] Only applicable to D325NT, D325NTR, D326NT, D326NTR, T327N and T327NR.
[17] Ampere rating of fuse or circuit breaker not to exceed switch ampere rating.
[18] Only applicable to DU324 and DU324RB. HD, JD = 25 kA maximum.
[19] SCCR = 50 kA, applicable to DU222RB, DU322 and DU322RB.
[20] Only applicable to DU323, DU323RB, DU325 and DU326.
9/13/2019