Backer keeps in stock a wide range of terminal boxes to be used with stock-kept immersion heaters and customer designed constructions.
The terminal boxes are designed for mounting onto immersion heaters with R 1 ¼" - R2" screw-plugs. The terminal boxes can be turned in any suitable position with respect to the cable inlet.
The covers are made of carbonate plastic or die-cast aluminium.
The terminal boxes are designed to meet the requirements for protection class IP55 or better.
The terminal boxes are available in many different models and can be equipped to meet most requirements regarding thermostat and thermal cut-off.
The product range, also include a terminal box in carbonate plastic to be used with our standard defrosting elements. This terminal box meet the requirements for protection class IP65.

Fields of application:
 |
 |
 |
| Industrial baths |
Immersion heater with terminal box |
Domestic water heater |
Terminal boxes - technical info:
| Material |
Silium Polycarbonate |
| Dimension |
Se product informaion below |
| Assembly |
For mounting to our standard immersion heaters with R32/40 and R50 thread, the boxes are assembled with enclosed screws. |
| Design |
Without thermostat and thermal cut-off With thermostat 1-, 2-, or 3-pole With thermal cut-off 1- or 3-pole With thermostat and thermal cut-off |
| Protection class |
IP54, IP65 |
Examples of products
 |
Termial box KT
Design in plastic. For separate mounting of thermostat TSDH/TSDO.
Drawing |
| KT-box |
1140839001 |
| Protection pipe L=140 |
1160052501 |
| Protection pipe L=280 |
1160052502 |
 |
Terminal box K1
Silium, for assembly on our G 1 1/4'' alt. 1 1/2'' element head. Rotating box for easy connection of the cables. Protection class IP54.
Drawing |
| K1 |
1130 397 201 |
 |
Termial boxes K7 and K7T
Silium with lid from polycarbonate. For assembly on G 1 1/4''-2'' element head. Rotating box for easy connection of the cables. Protection class IP54.
Drawing |
| K7 |
1130 541 001 |
| K7T |
1130 541 101 |
 |
Terminal boxes K8 and K8T
Silium with lid from polycarbonate, for mounting on G 2'' element head. Rotating box for easy connection of the cables. Protection class IP54.
Måttskiss
|
| K8 |
1125 001 003 |
| K8T |
1125 001 002 |
 |
Terminal boxes K11A, K12A, K12A
Silium with lid from polycarbonate, for mounting on our G 2'' element head. Rotating box for easy connection of the cables. Protection class IP54. Incl. terminal block.
Drawing |
| K11A |
|
X |
X |
1120332701 |
| K12A |
X |
|
X |
1120332801 |
| K13A |
|
|
X |
1120332901 |
 |
Terminal box K15
Silium with lid from polycarbonate, for mounting on our G 2'' element head. Rotating box for easy connection of the cables. Incl. terminal block. Protection class IP54.
Drawing
|
| K15 |
X |
X |
1120391801 |
 |
Terminal box K16
In silium, for mounting on our G 1 1/4''-2'' element head. Rotating box for easy connection of the cables. Incl. terminal block. Protection class IP54.
Drawing
|
| KT-box |
G 2'' |
1120 548 202 |
 |
Terminal box K17
In silium, for mounting on our G 2'' element head. Rotating box for easy connection of the cables. Incl. terminal block. Protection class IP65
Drawing Steering basket |
| K17 |
1120 548 301 |
 |
Terminal box K18
In silium, for mounting on our G 2'' element head. Rotating box for easy connection of the cables. Incl. terminal block. Protection class IP65.
Drawing Steering basket |
| K18 |
1120 548 502 |
 |
NEW!!! Terminal box K31A
Terminal box in plastic with 3-pole combi-thermostat, for use togehter with Backer’s 1¼’’-2’’ element heads. The box can be rotated to obtain suitable location of the cable inlet. Together with our pressed element head 1,5’’ the product is protection classed IP65.
|
| K31A |
1150 666 001 |

|
NEW!! - launched summer 2010 Electronical terminal box K31E
Terminal box with electronic setting of desired temperature. Possibility for external control via e.g. a central control unit.
Open datasheet (pdf)
|
| K31E |
1150 704 601 |
to the top of the page
Steering basket
Steering basket for terminal boxes K17 and K18
 
For all: Thermal cut-off: 3-pole, 110°C, Breaking capacity: A/V: 20/400 |
| S17A |
K17 |
2-pole 30-90°C |
16/400 |
1130685401 |
| S17D |
K17 |
- |
- |
1130 710 201 |
| S17B |
K17 |
2-pole 0-50°C |
16/400 |
1130 685 402 |
| S17C |
K17 |
4-pole 30-90°C |
16/400 |
1130 685 801 |
| S18A |
K18 |
4-pole 30-90°C |
16/400 |
1120 550 701 |