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NEMA Terminal Blocks
Heavy Duty — Phenolic
313
Thomas & Betts Electronics/OEM Division Tel: 901-252-7766 Fax: 901-252-1312
Dimensions shown are for reference only. Dimensions are in inches.
200 SERIES
HEAVY DUTY-PHENOLIC
SPECIFICATIONS
LR25557
E63810
Standard Contacts
MATERIAL: Electrical grade copper or copper alloy
conductor. Steel Screws plated to resist corro-
sion in most industrial applications.
Environmental Contacts
(for highly corrosive atmospheres)
TUBULAR SCREW: - Electrical grade copper tube
with nickel plating.
Nickel plated brass screws.
STRAP SCREW: - Nickel plated brass straps and
screws
Nickel plating exceeds specification QQ-N-290
Class I, Type VII.
WIRE RANGE: Strap Screw: #22-10AWG max.,
solid or stranded with crimp terminals
STRAP CLAMP: #18-8AWG, solid or stranded
TUBULAR SCREW: #18-4 AWG, solid or stranded
TUBULAR CLAMP: #18-6AWG, solid or stranded
WIRE STRIP LENGTH: Strap Screw: As needed for
lugging
STRAP CLAMP: 1/2 in.
TUBULAR SCREW: 1/2 in.
TUBULAR CLAMP: 1/2 in.
SCREW TYPE: Strap Screw: 10-32 slotted binding
head
STRAP CLAMP: 8-32 pan head w/ clamp
TUBULAR SCREW: 1/4-28 slotted headless
TUBULAR CLAMP: 1/4-28 slotted headless
STRAP SCREW: Maximum width of lugs: 11/32 in.
Nylon Housing
MATERIAL: Phenolic, Filled Flame Retardant
MAX. CONTINUOUS TEMPERATURE: 150C, (302F)
BREAKDOWN VOLTAGE:
Contact to Contact: 7800V
Contact to Ground: 9400V
DIELECTRIC STRENGTH (RH40% at Sea Level): 300
Volts/mil thickness per ASTM #D149
UL HIGH VOLTAGE ARC TRACKING (INCHES/MIN.):
.49-.58
WATER ABSORPTION (24 hrs. % wt. gain): 0.45%
per ASTM D570
FLAMMABILITY: UL94V-1
CHEMICAL RESISTANCE: Resistant to acids, alka-
lies, and aliphatic hydrocarbons and ketones, per
ASTM D543.
RADIATION RESISTANCE
(ergs g-1 (C)): 2.7 x 108
min.
COLOR: Black
INDEPENDENT TESTING SERVICE
LISTING AND RECOGNITION
WIRE SIZES, Solid or Stranded Tublar Screw
Tubular Screw
1 #4 AWG, 1 #6 AWG,
1 or 2 #8 AWG, 1 to 4 #10 AWG,
1 or 5 #12 AWG, 1 to 6 #14 AWG,
1 or 6 #16 AWG, 1 to 8 #18 AWG,
Tubular Clamp
1 #6 AWG, 1 or 2 #8 AWG,
1 to 3 #10 AWG, 1 to 4 #12 AWG,
1 or 4 #14 AWG, 1 to 6 #16 AWG,
1 or 8 #18 AWG
Strap Clamp
1 #18 to 1 #8 AWG