Power Junction Boxes & Splitters
Industrial power junction boxes and splitters for organized, safe, and efficient power distribution in oil & gas, mining, manufacturing, and utility applications.
Custom Junction Boxes & Splitters for Industrial Power
Our power junction boxes and splitters provide a central, organized connection point for distributing power from a single source to multiple circuits or loads. Built to withstand extreme temperatures, moisture, corrosion, and mechanical stress, they are engineered for oil & gas, mining, manufacturing, and utility environments where reliability is non-negotiable.
- LV junction boxes: up to 1,000 V — compact, multiple connection points
- MV junction boxes: 1 kV to 35 kV — NEMA-rated, corrosion-resistant enclosures
- Power splitters: efficient distribution from a single source to multiple outputs
- Weatherproof (NEMA 3R / 4X) and explosion-proof (Class I Div 1 / 2) options
- Door limit switches for upstream breaker trip on door access
- Custom gland plates, busbar sizing, and lug selection per cable schedule
What's Included
- Main copper busbar — pre-drilled for mechanical or compression lugs
- Ground busbar with multiple landing points
- Voltage-rated insulator standoffs per NEMA spacing requirements
- Non-ferrous aluminum gland plates — top and bottom cable entry
- Plastic insulation barriers between voltage sections
- Door limit switch — trips upstream breaker when door is opened live
- Drain breather for moisture management in outdoor enclosures
- IR windows for thermographic inspection without opening door
- NEMA 12 (indoor) or NEMA 4X (outdoor / corrosive) standard
- +Posi Pin connectors — hot-stick operable with visible open-air isolation gap
- +Safety ground check mechanism — confirms de-energization before access
- +Explosion-proof enclosure (Class I Div 1, Zone 1 IECEx)
- +Fibreglass enclosure for highly corrosive environments
- +International Orange or custom RAL colour-coded paint
- +Compression lugs with torque indicator strips for field connection
- +Oversized busbar for high-current cable splicing
- +Third-party witnessed inspection and FAT
Full Specifications
| Parameter | Value |
|---|---|
| LV Rating | Up to 1,000 V AC |
| MV Rating | 1 kV to 35 kV (common: 5 kV, 8 kV, 15 kV) |
| Bus Material | Copper with 2-hole NEMA pads (standard) |
| Enclosure Rating | NEMA 12 (indoor), NEMA 3R (rainproof), NEMA 4X (watertight) |
| Enclosure Material | Painted steel, stainless steel 304 / 316, fibreglass |
| Gland Plates | Non-ferrous aluminum (standard), stainless steel option |
| Insulators | Voltage-rated standoff insulators per NEMA phase spacing |
| Safety Interlock | Door limit switch wired to upstream trip coil (standard) |
| Lugs | Mechanical or compression (Burndy, Ilsco) — site-specific sizing |
| Standards | CSA C22.2, UL Listed, NEMA standards |
| Lead Time | 3–6 weeks from approved cable schedule |
Built to Standard
Where It's Used
- Oil & gas wellsite and pipeline power distribution nodes
- Mining site cable splice and distribution junction points
- Industrial manufacturing power feed transition points
- Utility underground cable splice enclosures
- Renewable energy (solar / wind) AC cable junction points
- Water and wastewater treatment plant cable distribution boxes
- Marine and port shore power distribution
- Skid-mounted equipment power feed and distribution
From design and specification through factory testing, commissioning, and ongoing maintenance — Candron delivers at every phase.
- Engineering drawings and coordination studies
- Factory acceptance testing (FAT) with full reports
- Site commissioning and protection settings
- Spare parts, training, and maintenance support
Common Questions
A junction box provides a central enclosure for splicing or connecting multiple cables at a common busbar. A power splitter takes a single input cable and distributes it to multiple output circuits with individual lugs or terminals per output. In practice, many units serve both functions and are custom-designed per the cable schedule.
Yes. We build Class I, Division 1 (explosion-proof) and Division 2 junction boxes for oil & gas, mining, and chemical plant environments. Division 1 enclosures use CSA / UL-certified explosion-proof housings and conduit fittings. Division 2 units can use standard industrial enclosures with appropriate seals and wiring methods.
A door limit switch is a contact inside the junction box that detects when the door is opened. It is wired to the trip coil of the upstream circuit breaker or load break switch — opening the door while the box is energized automatically trips the upstream breaker, de-energizing the junction box before personnel can access the busbars.
Yes. Posi Pin connectors are hot-stick operable and provide a visible open-air gap between the cable and the busbar when disconnected — giving a visual confirmation of isolation without opening the upstream breaker. They are commonly specified for 5 kV and 8 kV mining and oil & gas applications.
Ready to Spec
Your Project?
Our engineering team responds with specs, lead times, and pricing the same day. Tell us what you need:
- Voltage rating (LV up to 1 kV, or MV rating in kV)
- Cable schedule (number of cables, conductor size, entry direction)
- Busbar current rating and size required
- Enclosure type (NEMA rating, material — steel, SS, fibreglass)
- Safety interlock requirements (door limit switch, ground check)
- Hazardous area classification (Div 1 / Div 2, Zone 1 / 2) if applicable
Send us your project details and we'll respond with a price, lead time, and any clarifying questions — typically within a few hours.
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