Description
Stainless Steel Electrical Junction Boxes , Electrical pressed Boxes from Stainless Steel
Stainless Steel Fittings India manufactures a comprehensive range of stainless steel electrical junction boxes, weatherproof terminal enclosures, flameproof (Ex d) and increased-safety (Ex e) junction boxes, cable junction boxes, and custom fabricated enclosures in SS 304 and SS 316 grades. Designed for outdoor switchyards, hazardous process areas, marine electrical systems, and industrial cable termination points where mild steel or plastic enclosures cannot withstand corrosive or classified environments. Supplied to electrical OEMs, EPC contractors, power utilities, and industrial distributors worldwide. Price: US$ 11.50/Kilogram
Stainless steel electrical junction boxes are fabricated and stamped enclosures that house cable terminations, splices, and distribution points while protecting internal wiring from moisture, dust, chemical attack, and mechanical damage. Manufactured by precision sheet metal forming, welding, and stamping of SS 304 and SS 316 sheet, these enclosures are engineered to defined IP ingress protection ratings and, where required, hazardous area explosion-protection standards for use in petrochemical, offshore, and power utility installations.
Stainless Steel Weatherproof Junction Boxes (IP65/IP66/IP67)
Wall-mounted and pole-mounted SS junction boxes with gasketed hinged or bolted covers are fabricated to IP65, IP66, and IP67 ingress protection ratings for outdoor cable termination, street lighting distribution, and instrumentation cable junctions. EPDM or silicone door gaskets and stainless cover latches maintain a weatherproof seal through repeated access for maintenance in coastal and high-humidity installations.
Stainless Steel Flameproof & Explosion-Proof Junction Boxes
Ex d flameproof and Ex e increased-safety junction boxes are fabricated in SS 316 for Zone 1 and Zone 2 hazardous areas in oil and gas processing, chemical plants, and offshore platforms. Flame-path machined joints, certified cable gland entries, and internal earth studs meet IEC 60079 series requirements for gas group IIA, IIB, and IIC classified installations.
Stainless Steel Terminal & Cable Junction Boxes
Multi-way terminal junction boxes with DIN rail mounted terminal blocks, cable glands, and gland plates are fabricated in SS 304/316 for control cable distribution, instrumentation loop junctions, and power distribution splice points. Removable gland plates allow field modification of cable entries without compromising the enclosure’s ingress protection rating.
Stainless Steel Junction Boxes for Marine & Offshore
Marine-grade SS 316 junction boxes with corrosion-resistant hinges, captive stainless fasteners, and salt-spray tested gaskets are supplied for shipboard electrical distribution, offshore platform instrumentation, and desalination plant cable termination where continuous saltwater spray exposure would rapidly corrode painted mild steel enclosures.
Stainless Steel Junction Boxes with Hinged/Bolted Covers
Hinged-cover junction boxes provide quick access for maintenance while bolted multi-screw covers provide higher ingress protection and tamper resistance for public-access and hazardous locations. Both configurations are available with clear inspection windows, external earthing lugs, and padlocking facilities for restricted-access installations.
Stainless Steel Junction Boxes for Solar & Renewable Energy
String combiner and array junction boxes in SS 304/316 house DC combiner terminals, surge protection devices, and fuse holders for solar PV installations exposed to prolonged outdoor UV and weather exposure. Stainless construction avoids the embrittlement and corrosion common to polymer and painted steel enclosures over a 25-year PV system service life.
Custom Fabricated Stainless Steel Enclosures
Custom-sized SS enclosures, junction pits, and cable pull boxes are fabricated to drawing for non-standard cable distribution requirements in EPC power and process projects. CNC laser cutting, press braking, and TIG welding produce enclosures to specified IP ratings, mounting configurations, and internal partition layouts.
Key Features
- Comprehensive range: weatherproof, flameproof, terminal, marine, and solar junction boxes
- IP65, IP66, and IP67 ingress protection ratings as standard; IP68 on request
- IEC 60079 compliant flameproof (Ex d) and increased-safety (Ex e) variants available
- SS 304 and SS 316 construction for indoor, outdoor, and hazardous-area service
- Removable gland plates and DIN rail terminal mounting options
- Custom fabrication to drawing for non-standard sizes and cable entry layouts
- Competitive pricing from US$ 11.50/kg with volume OEM discounts
- EN 10204 3.1 Mill Test Certificates and IP test reports available
IP Ingress Protection Ratings Explained
IP65 provides protection against dust ingress and low-pressure water jets; IP66 withstands powerful water jets from any direction; IP67 permits temporary immersion up to 1 metre. Junction box IP rating selection depends on installation location, wash-down requirements, and exposure to rain, spray, or submersion during flooding events.
Hazardous Area Classification (Zone 1/2, Ex d, Ex e)
Zone 1 areas require Ex d flameproof enclosures capable of containing an internal explosion without propagating it externally, while Zone 2 areas permit Ex e increased-safety enclosures relying on the absence of arcing or sparking components. Gas group (IIA/IIB/IIC) and temperature class (T1–T6) ratings determine the specific certified enclosure required for a given hazardous location.
Gasket & Sealing Systems for Weatherproofing
EPDM, silicone, and neoprene door gaskets are bonded or mechanically retained in a groove to maintain IP-rated sealing over the enclosure’s service life. Multi-point cam latches and hinge compression ensure even gasket loading, preventing localized gaps that would otherwise compromise the ingress protection rating.
Earthing & Bonding Provisions
External earth studs, internal earth bars, and bonding lugs are standard on all SS junction boxes to maintain electrical continuity and fault protection per IEC 61439 and local electrical codes. Hazardous-area units include certified internal and external earth connections per IEC 60079-14 installation requirements.
Cable Gland Entry & Plate Options
Pre-drilled, tapped, or blank gland plates in SS 304/316 accommodate metric or NPT cable glands as specified. Removable gland plates simplify field installation and allow re-configuration of cable entries without re-certifying the enclosure body in hazardous-area applications.
Surface Finish & Corrosion Resistance
Standard 2B mill finish, brushed No. 4 finish, and electropolished finishes are available. SS 316 is recommended for coastal, offshore, and chemical process areas where chloride exposure would pit SS 304 over time.
Technical Specifications
| Parameter | Specification |
|---|---|
| Material | SS 304, SS 316 (body, hinges, and fasteners) |
| Ingress Protection | IP65, IP66, IP67 (IP68 on request) |
| Hazardous Area Rating | Ex d IIC / Ex e II, Zone 1 & Zone 2 (IEC 60079 series) |
| Sheet Thickness | 1.2 mm – 3 mm depending on box size and rating |
| Standards | IEC 60079, IEC 61439, IS 2147, ISO 9001:2015 |
| Gasket Material | EPDM, Silicone, Neoprene |
| Surface Finish | 2B mill finish, No. 4 brushed, electropolished |
| Price | US$ 11.50 / Kilogram |
Material Grade & International Equivalents
| Grade | UNS | EN/W.Nr. | DIN | JIS | BS |
|---|---|---|---|---|---|
| SS 304 | S30400 | 1.4301 | X5CrNi18-10 | SUS 304 | 304S31 |
| SS 316 | S31600 | 1.4401 | X5CrNiMo17-12-2 | SUS 316 | 316S31 |
| SS 316L | S31603 | 1.4404 | X2CrNiMo17-12-2 | SUS 316L | 316S11 |
Product Types / Variants
| Type | IP Rating | Typical Size Range | Application |
|---|---|---|---|
| Weatherproof Terminal Box | IP65–IP67 | 100x100mm – 600x600mm | Outdoor cable termination, street lighting |
| Flameproof Junction Box (Ex d) | IP66 | Certified sizes | Zone 1/2 hazardous process areas |
| Increased Safety Box (Ex e) | IP66 | Certified sizes | Zone 2 hazardous areas, cable junctions |
| Marine Junction Box | IP66–IP67 | 150x150mm – 500x500mm | Shipboard and offshore electrical distribution |
| Solar Combiner Box | IP65–IP66 | Custom | PV string combining, DC distribution |
| Custom Cable Pull Box | Per drawing | Custom | EPC project-specific cable distribution |
Applications in Industry
| Industry | Application |
|---|---|
| Power Transmission & Distribution | Outdoor switchyard cable junctions, street lighting distribution boxes |
| Oil & Gas / Petrochemical | Zone 1/2 flameproof and increased-safety junction boxes |
| Marine & Offshore | Shipboard electrical distribution, platform instrumentation junctions |
| Renewable Energy | Solar PV combiner boxes, wind turbine junction enclosures |
| EPC / Industrial Projects | Custom cable pull boxes, control cable distribution points |
| Water & Wastewater | Corrosion-resistant junction boxes for treatment plant electrical systems |
Manufacturing Process
SS sheet is CNC laser cut and press-braked into enclosure body, cover, and gland plate profiles, then TIG welded at corner seams for a fully sealed weld line. Flame-path joints for Ex d enclosures are precision machined to certified clearance and width tolerances. Gasket grooves are formed or welded, and hinges, latches, and earth studs are fitted before IP testing on a water-jet and dust-chamber test rig. Finished boxes are passivated, dimensionally inspected, and packed with cable gland kits as specified.
Quality Standards & Certifications
- IEC 60079 series – Explosive atmospheres, equipment requirements
- IEC 60529 – Degrees of protection provided by enclosures (IP Code)
- IEC 61439 – Low-voltage switchgear and controlgear assemblies
- IS 2147 – Degrees of protection provided by enclosures for low voltage switchgear
- ISO 9001:2015 – Quality Management System
- EN 10204 3.1 – Mill Test Certificates
Why Choose Us
- Comprehensive range: weatherproof, flameproof, marine, and solar junction boxes
- IEC 60079 and IP65–IP67 tested and certified manufacturing
- SS 304 and SS 316 construction with custom fabrication to drawing
- Competitive pricing from US$ 11.50/kg with volume OEM discounts
- EN 10204 3.1 MTCs and IP/hazardous-area test reports with every shipment
- Active export to USA, UK, UAE, Saudi Arabia, Germany, South Korea, Singapore
Frequently Asked Questions
What IP rating do your junction boxes carry?
Standard boxes are rated IP65, IP66, or IP67; IP68 submersible-rated boxes are available on request.
Do you supply flameproof junction boxes for hazardous areas?
Yes. Ex d flameproof and Ex e increased-safety junction boxes are manufactured to IEC 60079 for Zone 1 and Zone 2 classified areas.
Which grade is recommended for offshore and marine installations?
SS 316 is recommended for offshore, marine, and coastal installations due to superior chloride pitting resistance versus SS 304.
Can gland plates be modified on site?
Removable gland plates allow field drilling and gland fitting without affecting the certified enclosure body in non-hazardous applications; certified hazardous-area units require factory-fitted glands.
Do you provide custom size fabrication?
Yes. Custom-sized enclosures and cable pull boxes are fabricated to customer drawings for EPC and OEM projects.
Are earthing provisions included?
Yes. External earth studs and internal earth bars are standard on all junction boxes.
What gasket materials are available?
EPDM, silicone, and neoprene gaskets are available depending on temperature and chemical exposure requirements.
Do you supply solar combiner boxes?
Yes. SS combiner and array junction boxes are supplied for PV string combining and DC distribution applications.
What test certificates are provided?
EN 10204 3.1 Mill Test Certificates and IP ingress protection test reports are supplied with every shipment; hazardous-area certification documentation is provided for Ex-rated units.
What is your minimum order quantity?
MOQs vary by size and configuration; both project-volume and distributor-stock quantities are supported. Contact us for a specific quotation.
Equivalent Terms in Other Languages
Spanish: Caja de conexiones de acero inoxidable, Caja de empalmes inox, Caja terminal eléctrica inoxidable, Caja antiexplosiva inox
Russian: Коробка распределительная из нержавеющей стали, Электрическая клеммная коробка, Взрывозащитная коробка, Коробка IP66 нержавеющая
French: Boîte de jonction en acier inoxydable, Boîte de dérivation inox, Boîte antidéflagrante inox, Coffret électrique inoxydable
Portuguese: Caixa de junção em aço inox, Caixa de derivação inoxidável, Caixa à prova de explosão inox, Caixa terminal elétrica inox
Italian: Scatola di giunzione in acciaio inox, Cassetta di derivazione inox, Scatola antideflagrante inox, Custodia elettrica inossidabile
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Contact Stainless Steel Fittings India for competitive pricing and technical specifications for stainless steel electrical junction boxes. Price from US$ 11.50/kg. IEC 60079 and IP65–IP67 compliant manufacturing; custom fabrication available. OEM and EPC project volume inquiries invited.
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