terminal box terminal boxes , to european standards (atex) 03-0330-0200-10/99-bcs-b201171/1e 2/18 explosion protection ex protection type (according to en 50014) ex ii 2 gd t 85c, eex e ii t6 increased safety bs en 50014, bs en 50019; 1994 bs en 50281-1-1; 1998 ambient temperature - 20 c to + 40 c (special temperature range on request) extended ambient temperature range - 55 c to + 65 c technical data material polyester black, anti-static, glass-fibre reinforced, surface resistance <10 9 w flame retardant: iec 92.1, ul94v0 colour/coating polyester black, anti-static lid screws captive slotted or hexagon socket screw, (other models on request) high-quality stainless steel 316 standard-seals captive silicone o-ring in groove, (seals on request) protected against the penetration of foreign bodies, according to ip 66 (iec 144/en 60529) - 55 c to + 80 c mechanical resistance impact energy > 2 x 7 nm (according to en 50014) protection class en 60529/iec 60529 (higher protection class on request) ip 66 max. power dissipation at tu + 40 c, 4 w at tu + 55 c, 2 w at tu + 65 c, 1.3 w certification empty enclosure: part certification (further certifications on request) bas98atex3007u distribution box: conformity certification bas98atex3008x accessories earthing bars os3, xe earthing studs, es earthing studs terminal box type otb-122 terminal box, empty enclosure type oeb-122 features t atex certification t baseefa test certification t versions with horizontally, vertically or diagonally mounted terminal strip t different terminal types can be mounted t external earth connection t extended ambient temperature range t possibility of an m 20/m 25 cable entry in the lid t integrated earthing pad for metal glands installation instructions the installer must make sure that the enclosure used is suitable for the corresponding field of application. this means that the marking must correspond to the classification of the ex area. also must the temperature class of the distribution box meet the respective requirements. description the otb terminal box, both distribution box and empty enclosure, is manufactured of high impact resistance proof, glass-fibre reinforced polyester smc & dmc providing extraordinary stability and corrosion resistance. the standard enclosure consists of black, anti- static material. otb distribution box and empty enclosure have been tested and approved by the baseefa authorities according to the latest european standards. these correspond to the requirements of the ec directive 94/9/ec (atex). black
1 2 3 4 5 all dimensions in mm. fixing hole diameter 7 mm. dimensions view on sides a+b and c+d view on side r entries max. current (a) 15 15 14 21 26 37 21 21 21 20 26 37 max. voltage (v) 550 275 418 726 1 horizontal or diagonal 1 horizontal 1 diagonal 1 horizontal or diagonal 1 horizontal or diagonal 1 horizontal or diagonal n/a n/a number of strips ek 4 bet 2 ek 4 ek 10 bet 2 bet 2 earth terminal 10 sak 2.5 11 sak 2.5 12 sak 2.5 8 sak 4 6 sak 6n 5 sak 10 bk 3 (1 x 3-pole) bk 4 (1 x 4-pole) bk 6 (1 x 6-pole) bk 12 (1 x 12-pole) mk 6/6 (1 x 6-pole) btb 4 (1 x 4-pole) btb 6 (1 x 6-pole) max. number of terminals 0.5 to 2.5 0.5 to 4.0 0.5 to 6.0 2.5 to 10.0 0.5 to 4.0 0.5 to 6.0 0.5 to 16.0 * t a maximum of 2 earthing bars type qs3 may be fitted. t alternative terminal types are available. the maximum number of terminals listed above depends on the maximum conductor size and maxi- mum current. at least one earth terminal must be connected. the enclosure can be mounted with the terminal strip horizontally or vertically aligned or equipped with a single diagonally mounted terminal strip. max. conductor size (mm2) max. conductor size selection chart 2/19 03-0330-0200-10/99-bcs-b201171/2e side d side b side c side a t single m 20 entry in the lid is also possible. t single m 25 entry in the lid is also possible. special rear entry positions thread size side max. entries per side position of holes notes 2 r2, r5 4 r1, r3, r4, r6 t other equivalent entry sizes (such as pg) are available. t eex e ii nylon plugs can be fitted as required. thread size side max. entries position of holes notes per side m 20 a+b 11m 2 2m, 3m locknuts max. 27 mm a/c c+d 1 1m or 2m or 3m 2 2m, 3m locknuts max. 27 mm a/c m 25 a+b 1 1m c+d 1 1m standard entry arrangements terminal box, otb-122, to european standards (atex) order no.: otb-122 0.5 to 4.0 0.5 to16.0 * 0.5 to 4.0 2.5 to 10.0 0.5 to 16.0 * 0.5 to 16.0 * side a m 20 r locknuts max. 27 mm a/c
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