Determine NEC, CSA, other requirements applicable fuse blocks wil

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Determine NEC, CSA, other requirements applicable fuse blocks wil

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Fuse Blocks
Determine NEC, CSA, other requirements applicable
fuse blocks will installed equipment submitted agency approval, requirements should obtained from approving agency advance fuse fuse block selection.
Select type wire termination
choice three types wire termination available: Screw* with spade lugs ring terminals. Screw with Pressure Plate* with solid stranded wire without terminal. Recommended where vibration will factor. most durable. with types solid wire Class Class stranded wire. with welding cable other rope-stranded conductors. 1/4" Quick Connect terminals rated available Midget Class fuse blocks.
Fuse Block Selection
following guidelines should help simplify selection proper fuse blocks: Screw with Pressure Plate Screw
Determine system voltage
Since fuses selected basis system voltage, fuse blocks selected match voltage rating fuse.
Decide number poles each block Determine design short-circuit current
Available and/or design short-circuit current important consideration when determining class fuse fuse blocks use. available short-circuit current cannot determined, will vary with equipment location, select fuses with 200,000 ampere interrupting rating (A.I.R.) mating fuse blocks with withstand rating 200,000 amperes maximum safety. Class fuse blocks will accept Class fuses (which have interrupting rating 50,000 amperes) Class fuses (which have 200,000 A.I.R.). prevent possibility inserting fuse with incorrect interrupting rating, Class fuse blocks recommended with Class fuses. Class fuse blocks with Class fuses. These fuse blocks dimensionally same, Class fuse blocks incorporate rejection feature which allows only Class fuses inserted. number poles each fuses determined characteristics circuit. option gang individual fuse blocks into long strips will determined available space type wire being used.
Determine fuse clips need reinforced
Fuse clips have tendency lose some their tension over period time. This prevented specifying reinforced fuse clips. Reinforced clips standard certain fuse blocks (see individual product pages).
Ordering Information
Littelfuse fuse block part number consists components, shown below individual fuse block data tables.
Determine type ampere rating fuse used
addition voltage interrupting rating discussed above, fuse ampere rating, opening characteristics (fast acting time-delay) size other important considerations fuse selection. Once fuse type selected, mating fuse block chosen. Fuse blocks available 100, 200, ratings, used with fuse rated corresponding amperage rating below. example, fuse block rated amperes used with fuse rated from amperes.
Class Class Fuse Blocks
2005 Littelfuse POWR-GARDProducts Catalog
Class Midget Class Fuse Blocks
www.littelfuse.com
Class Fuse Blocks
Specifications
Voltage Ratings: Ampere Ratings: Approvals: Volts 20A) Volts 60A) amperes Listed: (File E14721) (File E14853) Certified: (File LR7316) (File LR47235)
Recommended Fuses
series fuses
Rating Poles Catalog Number LG30015-1 LG30015-2 LG30015-3 LG30020-1 LG30020-2 LG30020-3 L30030G-1 L30030G-2 L30030G-3 LG30060-1 LG30060-2 LG30060-3 Connector Type (Add Suffix Shown)
Screw Pressure Plate
Maximum Wire Size
Class fuse blocks designed with volt time-delay, current-limiting Class fuses. They meet requirements branch circuit protection. 0.36"
[9.13]
CU-AL
Note: Class fuse blocks equipped with Quick Connect Terminals. fuse block equipped with reinforcing spring standard.
LG30015 LG30020 MOUNTING SLOTS
[10.72]
0.42"
[19.45]
0.77"
LG30060
0.17" 0.22" [4.37 5.56]
[21.83]
0.86"
POLE
1.675" [42.55]
POLE
[10.72]
0.42"
[38.89]
1.53"
[76.2]
3.0"
2.375"
[60.33]
POLE
0.22"
[5.56]
Note: Refer Midget/Class Fuse Blocks L30030G Class Block dimensions.
www.littelfuse.com
2005 Littelfuse POWR-GARDProducts Catalog

Determine NEC, CSA, other requirements applicable fuse blocks wil

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