Product Brochure
Catalog Numbering System 
for Safety Switches
For Types 7 and 9 construction, see the latest catalog listing.
EI or EI2 = Factory-installed 
electrical interlock
CLR = Class R fuse kits
FP = Fuse pullers
GL = Ground lugs
SLC = Copper lugs
LK = Compression lugs
SPLO = Lock on
VW = Viewing window
NP = Phenolic legend plate
KI = One-key interlock
KIKI = Two-key interlocks
WA = Appleton Powertite
®
interlocked receptacle
WC = Crouse-Hinds Arktite
®
interlocked receptacle
WH = Hubbellock
®
interlocked receptacle
D 3 2 1 N RB
Enclosure
• No Suffix = Type 1
• A = Type 12K
• AWK = Type 12 
(without knock-out)
• DS = Types 4, 4X, 5 
(304 stainless steel)
• SS = Types 4, 4X, 5 
(316 stainless steel)
• CS = Cast aluminum
• DX = Type 4X Krydon
®
— 
Crouse-Hinds
®
• R = Type 3R
• RB = Type 3R 
(Type B hub provision)
• DF = Type 4X fiberglass 
reinforced polyester
Neutral
N = Factory-installed neutral (neutrals are field-installable on most general-duty      
 and heavy-duty safety switches)
Ampere Rating
1 = 30 A 
2 = 60 A
3 = 100 A 
4 = 200 A
5 = 400 A 
6 = 600 A
7 = 800 A 
8 = 1,200 A
Voltage Rating
1 = 120 Vac
(Plug fuse)
2 = 240 Vac 6 = 600 Vac  For DC ratings, see the 
latest catalog listing.
Blades Switchable Poles
1 = One-pole 
2 = Two-pole
3 = Three-pole
4 = Four-pole
6 = Six-pole
Type of Switch
Fusible:
Miscellaneous
6
L = Light-Duty 
D = General-Duty 
H = Heavy-Duty 
DT = Double-Throw
Non-fusable: DU = General-Duty 
HU = Heavy-Duty 
DTU = Double-Throw








