nema terminal blocks medium duty ?phenolic d escription /a pplication this family of phenolic blocks is ideal for high temperature applications. the rugged material withstands temperatures up to 302? f (150? c). d esign a dvantages quick-connect contact sections available - accept female 1/4 inch (6.3mm) quick-connect terminals. ?broad wire range - accept single or combination of awg sizes #22 up to #8 solid or stranded, depending on contact style selected. ?20 to 50 amperes rating per circuit, depending on contact style selected - see selector chart for specific ratings. surface mounted flat base and channel mounted dovetail base models available. ?packaged for rapid handling and assembly - snap-fit sections are packed 100 per carton. ?only one end section needed per block assembly. fanning strips - interlocking sectional fanning strips allow entire circuit groups to be connected and disconnected as a single unit. ?select any of five contact styles - including two types of quick connect sections. ?readily identify circuits - blocks available with painted marking surface or use removable vinyl marking strip. preprinted marking strips are also available. factory assembled blocks available. medium duty phenolic block sections snap-fit with 300 & 600v nylon and poly., heavy duty, intermediate heavy duty, and fuse and switch blocks. 269 thomas & betts electronics/oem division tel: 901-252-5000 fax: 901-252-1312 500 series medium duty phenolic lr25557 e63810
dimensions shown are for reference only. dimensions are in inches. nema terminal blocks medium duty ?phenolic 270 thomas & betts electronics/oem division tel: 901-252-5000 fax: 901-252-1312 lr25557 e63810 500 series 300 v phenolic 0.44" pitch high temperature strap screw tubular screw tubular clamp quick connect characteristics type of block model model model model direct mount (flat base) painted 521-bu 524 525 527 unpainted 511-bu 514 515-bu 517 channel mount (dovetail base) painted 0521 0524 0525 0527 unpainted 0511 0514 0515 0517 contact type specifications wire range (awg) solid & stranded 22-10 18-8 22-10 22-12 wire strip length (in.) 11 / 32 11 / 32 screw type 6-32 10-32 10-32 slotted binding head slotted pan head slotted pan head ampacity 35 a 50 a 30 a 20 a end sections direct mount 530-bu 530-bu 530-bu 530-bu channel mount 0530 0530 0530 0530 note: standard package is 100 pieces for contact and 25 pieces for end sections. notes: for factory assembled blocks, suffix catalog number with number of blocks desired. (maximum number of flat base preassembled sections is 12). example: twenty-five sections of tubular clamp sections preassembled on channel = 051525 for unpainted factory assembled blocks supplied with a removable marking strip add ?1 to catalog number. for blocks with two or more different contact sections, imprinted marking strips, or special features, consult factory. comparison (type of block) direct mount channel mount (flat base) (dovetail base)
dimensions shown are for reference only. dimensions are in inches. nema terminal blocks medium duty ?phenolic 271 thomas & betts electronics/oem division tel: 901-252-5000 fax: 901-252-1312 lr25557 e63810 tubular screw & quick connect tubular phil slot corrosion resistant strap screw corrosion resistant tubular screw corrosion resistant tubular clamp model model model model model 529 524ps d521 d524 d525 519 514ps d511 d514 d515 0529 0524ps d0521 d0524 d0525 0519 0514ps d0511 d0514 d0515 contact type 18-8 & 22-12 18-8 22-10 18-8 22-10 11 / 32 11 / 32 6-32 nickel plated 10-32 nickel plated 10-32 nickel plated slotted binding head slotted pan head slotted pan head 20 a 50 a 35 a 50 a 30 a 530-bu 530-bu 530-bu 530-bu 530-bu 0530 0530 0530 0530 0530 note: standard package is 100 pieces for contact and 25 pieces for end sections. ordering information catalog standard # description package 54-bu tubular screw 50 58 strap screw 50 54100 molding only, no contact 50 notes: for factory assembled fanning strips, suffix catalog number with number desired example: ten factory assembled sections of #58 = 5810
dimensions shown are for reference only. dimensions are in inches. nema terminal blocks medium duty ?phenolic 500 series accessories 272 thomas & betts electronics/oem division tel: 901-252-5000 fax: 901-252-1312 jumper snap-apart snap-apart snap-apart plastic plastic vinyl elevated nylon for tubular spade flanged ring tongue cloth cloth marking marking holding marking contacts jumper jumper jumper tape tape strips strip plug pen catalog number 40-bu j7140 j7240 j7340 66 55-bu 50-bu 52-bu 65-bu 99-bu standard package 100 40 ckt 40 ckt 40 ckt 1 sheet 50 feet 25 feet 18 inches 100 12 mounting channel channel clamps and accessories marking accessories jumpers break pre-punched elevated screw steel away aluminum aluminum channel universal snap-in see-thru ganging channel steel channel channel clamps clamps clamps cover rod catalog number 60 60-b-36 64 60-so 61 68 62 57 30-bu 63-bu 67 standard package 6 feet 3 feet 6 feet 6 feet 100 100 100 50 2 feet 3 feet 3 feet
nema terminal blocks medium duty - phenolic 273 thomas & betts electronics/oem division tel: 901-252-5000 fax: 901-252-1312 dimensions shown are for reference only. dimension s are in inches. 500 series technical data voltage rating: blocks meet 300 volt creepage and clearance requirements of nema, ul, and csa for general industrial control equipment and panel boards. withstand voltages greatly in excess of ieee switchgear standards for 750 volts. quick connect blocks retain 300v rating with insulated female quick connects. housing: m aterial : phenolic; filled, flame retardant m aximum s ervice t emp .: 150? (302?) b reakdown v oltage ac, 60h z contact to contact: 6,600v (3,800v w/ quick connect) contact to ground: 9600v d ielectric s trength : 300 volts/mil thickness per astm d149 (25?-rh40% at sea level) ul h igh v oltage a rc t racking t est (i nches / min .): .49-.58 w ater a bsorption (24 hrs . % wt . gain ): 0.45% per astm d570 f lammability : ul94v-1 c hemical r esistance : resistant to acids, alka- lines, and aliphatic hydrocarbons and ketones, per astm d543. r adiation r esistance ( ergs g -1 (c)): 2.7 x 10 8 c olor : black standard contacts electrical grade copper or copper alloy conduc- tor. steel screws. tube and screws are plated to resist corrosion in most industrial applications. environmental contacts (for highly corrosive atmospheres) t ubular s crew : electrical grade copper tube with nickel plating. nickel plated brass screws. s trap s crew : nickel plated brass straps and screws. nickel plating exceeds specification qq- n-290 class i, type vii. maximum width of lugs is 5/16" lr25557 e63810 group circuits with interlocking fanning strips
f lat b ase (d irct m ount ) dimensions shown are for reference only. dimensions are in inches. lr25557 e63810 274 thomas & betts electronics/oem division tel: 901-252-5000 fax: 901-252-1312 d ovetail b ase m ounted o n s tandard #60 c hannel sectional fanning strips nema terminal blocks medium duty ?phenolic 500 series 300 volt
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