Approved for installation in explosion hazard areas
Junction boxes for connecting of heating cables with mineral insulation are designed in 3 enclosure dimensions and intended for loop, star and delta connection.
The box can be mounted onto a wall, onto a nearby metal structure or using a bracket directly onto the pipeline. The choice of the mounting option also depends on the temperature of the heated system (pipeline). At a pipeline temperature of over 200 °C, it is recommended to mount the box on a wall or on an adjacent metal structure. The box allows to connect one section of the heating cable.
The enclosure design ensures moisture and dust ingress protection IP66 and high corrosion stability. 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 1.5 to 10 mm2 (JB2221-223 models) or up to 16 mm2 (JB2221-333, JB2221-533 models). Design options with screw or spring terminal straps are available to order.
|Dust and moisture protection rating||IP66|
|Explosion protection marking||
Ех еb IIC Т6...Т3 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|
max 750 V
| Operating current:|
max 50 A|
max 66 A
122×120×91.5 mm |
|Total weight (maximum):|
|Material Box / Color||Glass fiber reinforced polyester / Black|
|Material Pipe installation support / Color||Glass fiber reinforced polyester / Black|