Farwest manufactures a wide variety of custom junction and bond boxes to meet most cathodic protection field requirements. The details and components needed for these assemblies must be provided by the end user in order for us to provide the desired finished product.
Sourced from different manufacturers, there is an almost endless number of enclosure styles, materials and sizes that can be used for junction or bond box assemblies. The type of enclosure selected will depend on your preference, specification or the environment. Enclosure materials include galvanized steel, powder coated steel, stainless steel, aluminum, polycarbonate and fiberglass.
Enclosure Sizes & NEMA Ratings
The enclosure size should be dictated by the junction or bond box application. As the number of circuits or connections increase, so should the enclosure size and it is always best to have ample room inside the enclosure to allow easy access and an improved working environment. Farwest customer service personnel can assist you with enclosure sizing when needed.
NEMA ratings vary with the enclosure type and not all ratings are applicable to all enclosure styles. As a guideline, the most commons NEMA ratings for cathodic protection application are:
Note: As NEMA 4X enclosures are sealed from the environment, there is no natural ventilation. Therefore, installing heat generating devices, such as resistors, inside this enclosure type may not be practical.
Internal Components for Junction and Bond Boxes
As Farwest junction or bond box assemblies are very customized, we can install a wide variety of shunts, connectors, terminal blocks, slide resistors, rheostats or any other required equipment as dictated by your needs. If you provide the details, we can build it.
Bear in mind that there are always technical aspects to consider when building a custom junction or bond box assembly and those include mounting requirements, ventilation needs, current ratings, and more.
Slide resistors are used to add or reduce electrical resistance to control CP current to a pipeline or other structure. The Ohmite 210 series resistor is a reliable solution for this need and there are many sized to choose from depending on the amount of current per circuit. Slide resistors are not highly efficient and generate heat, which must be vented from any junction or bond box.
Choose Ohmite’s 210 Type adjustable resistors for applications requiring settings at different resistance values. These wirewound resistors are equipped with an adjustable lug, making them ideal for adjusting circuits, obtaining odd resistance values and setting equipment to meet various line voltages. 210 Type resistors feature a hollow core to permit secure fastening with spring-type clips or thru bolts with washers. They also offer the durability of lead free vitreous enamel coating and all-welded construction. Mounting brackets not included with resistors.
Rheostats are wirewound resistors used to add or reduce electrical resistance to control CP current to a pipeline or other structure. Adjusted by the turn of a knob, rheostats offer more controlability than a slide resistor. There are many Ohmite rheostats to choose from depending on the amount of current per circuit. Rheostats are not highly efficient and generate heat, which must be vented from any junction or bond box.