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参数资料
| 型号： | 427-BU |
| 厂商： | THOMAS BETTS CORP |
| 元件分类： | 接线盒 |
| 英文描述： | 255 A, MODULAR TERMINAL BLOCK, 2 ROWS, 1 DECK |
| 文件页数： | 2/4页 |
| 文件大小： | 185K |
| 代理商： | 427-BU |
NEMA Terminal Blocks
Ultra Heavy Duty
294
Thomas & Betts Electronics/OEM Division Tel: 901-252-5000 Fax: 901-252-1312
Dimensions shown are for reference only. Dimensions are in inches.
400 SERIES
ULTRA HEAVY DUTY
600V, 1.19" PITCH
PHYSICAL PROPERTIES
Housing:
HOUSING MATERIAL: Phenolic, filled flame retardant
FLAMMABILITY: UL94V-1
COLOR: Black
Contacts:
MATERIAL: Electrical grade copper conductor;
plated steel screws resist corrosion
TUBULAR SCREW TYPE:
Small: 1/2" - 13 Hex
Large: 3/4" - 16 Hex socket set screw
Mechanical:
PITCH (TERMINAL SPACING): 1.19"; 9 circuits/foot
WIRE STRIP LENGTH:
Tubular Screw (small): 1"
Tubular Screw (large): 1"
ELECTRICAL PROPERTIES
MAXIMUM CURRENT: 255A for a single 250MCM
wire
OPERATING VOLTAGE: Blocks meet 600V creepage
and clearance requirements; withstand voltage
greatly exceeds standards for 750V
WIRE RANGE: Tubular Screw (small): #12-#2/0
AWG solid or stranded; Tubular Screw (large) #6
AWG-250 kcmil (MCM) solid or stranded
DIELECTRIC STRENGTH (RH 40% @ SEA LEVEL): 300
V/mil thickness per ASTM D149
BREAKDOWN VOLTAGE, AC, 60HZ:
Contact to Contact: 10,000V
Contact to Ground: 10,000V
UL HIGH VOLTAGE ARC TRACKING (IN./MIN.): .49-.58
ENVIRONMENTAL PROPERTIES
MAX. CONTINUOUS TEMPERATURE: 150 C (302 F)
WATER ABSORPTION (24HRS. % WT. GAIN): .45%
per ASTM D149
CHEMICAL RESISTANCE: Resistant to acids, alkalies,
and aliphatic hydrocarbons and ketones per
ASTM D543
RADIATION RESISTANCE (ERGS G
-1 (C): 2.7 x 108
LR25557
E63810
Ordering Information
CATALOG
WIRE
#
DESCRIPTION
RANGE
416
Tubular Screw, Unpainted
#12-2/0
426-BU
Tubular Screw, Painted
#12-2/0
417
Tubular Screw, Painted
#6-250 Kcmil/MCM
427-BU
Tubular Screw, Unpainted
#6-250 Kcmil/MCM
430-BU
End Section
—
NOTE: For Direct
Mounting, use #10
pan head screws
every six circuits.
recommended torque:
15-20 lbs.-ins.
UL INDEPENDENT TESTING SERVICE RECOGNITIONS:
TUBULAR SCREW: Catalog # 416 & 426-BU
1 #2/0 AWG, 1 #1/0 AWG, 1 #1 AWG,
1 or 2 #2 AWG, 1 to 3 #4 AWG, 1 to 3 #6 AWG,
1 to 4 #8 AWG, 1 to 6 #10 AWG, 2 to 8 #12 AWG,
TUBULAR SCREW: Catalog # 417 & 427-BU
1 #250kcmil (MCM), 1 #4/0 AWG, 1 #3/0 AWG,
1 or 2 #2/0 AWG, 1 or 2 #1/0 AWG, 1 or 2 #1 AWG,
1 to 3 #2 AWG, 1 to 4 #4 AWG, 1 to 5 #6 AWG
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