Approved for installation in explosion hazard areas
Junction boxes models range JB222(3)1-223-1X(14-17) and JB222(3)1-223-2X(16-24) are designed for connecting control cables in the electric heating systems.
The boxes’ installation supposes 2 mounting variants according to the models chosen:
The box allows connection of one or two control cables, up to three temperature sensors and input through thermal insulation of up to four temperature sensors (one reserved).
The enclosure design ensures moisture and dust ingress protection IP66 and high corrosion stability. The cable glands of the box are intended for connecting unarmored power cables with a diameter of 7 to 18 mm or armored power cables with a diameter of 12 to 20 mm.
The installed terminal blocks allow the connection of multi-core or single-core wires with a cross-section of 0.5 to 2.5 mm2. Design options with screw or spring terminal blocks and with various types of explosion protection: models JB2221 — type “e” (increased safety) and models JB2231 — type “ia” (intrinsic safety) — are available.
|Dust and moisture protection rating||IP66|
|Explosion protection marking||
Ex eb IIC T6...T3 Gb |
Ех ia IIC Т6 Gb
Ex tb IIIC T85°C... T165°C Db
|Temperature group of the explosion hazard area||T6|
|Operating ambient temperature range||−60 ... +55 °С|
|Operating voltage||max 550 V|
|Operating current||max 21 A|
|Enclosure dimensions||122×120×91.5 mm|
|Total weight (maximum)||1.8 kg|
|Material Box / Color||Glass fiber reinforced polyester / Black|
|Material Pipe installation support / Color||Glass fiber reinforced polyester / Black|