Flameproof Junction Boxes / Explosion Proof Terminal Boxes Manufacturer India
Trimiti Electricals manufactures a comprehensive range of flameproof and weatherproof junction boxes for electrical cable termination and distribution in hazardous area installations. Also known as explosion proof terminal boxes, Ex-proof cable junction enclosures, or hazardous area marshalling boxes, our junction boxes are engineered to safely contain any internal arcing or sparking within the enclosure, preventing ignition of surrounding explosive atmospheres.
Built from robust cast iron or LM6 pressure die-cast aluminium, our flameproof junction boxes
feature precision-machined flame path joints that meet IS/IEC 60079-1 requirements. They are
suitable for Gas Groups IIA, IIB, and IIC, making them appropriate for the widest range of
hazardous gas classifications encountered in Indian industry. Cable entries are provided
through certified flameproof cable glands, ensuring the complete installation maintains its Ex
certification integrity.
Available Product Variants
i) Flameproof / Weatherproof Junction Box — Single, double, and multi-entry configurations
ii) Flameproof Marshalling Junction Boxes — For multi-cable terminations
iii) Flameproof Terminal Boxes — With DIN rail mounted terminal blocks
iv) Weatherproof Junction Boxes — For outdoor non-Ex Zone applications
v) Custom Junction Boxes — To customer-specified internal dimensions and entry arrangements
Industries & Applications
Our flameproof junction boxes are installed across oil & gas pipeline networks, petrochemical processing units, chemical reactors and storage areas, paint and varnish manufacturing plants, fertiliser complexes, LPG and CNG filling stations, pharmaceutical API manufacturing areas, offshore platforms, and sugar and distillery operations. Any location classified as Zone 1 or Zone 2 under IS/IEC 60079-10 requires certified flameproof junction boxes for all electrical cable connections.
Why Choose Trimiti Electricals for Flameproof Junction Boxes?
• Suitable for Gas Groups IIA, IIB, and IIC — widest hazardous gas coverage
• Precision-machined flame path joints machined to tight dimensional tolerances
• Available in cast iron and LM6 aluminium alloy — for weight-sensitive applications
• Multiple cable entry points available on all four sides
• Custom internal arrangement with terminal rails, earth bars, and labels
• Weatherproof variants available for outdoor installations outside Ex zones
Frequently Asked Questions
Q1. What is a flameproof junction box?
A flameproof junction box (Ex d junction box) is an explosion-proof enclosure used to safely house electrical cable connections in hazardous areas where flammable gases or vapours may be present. Its robust construction and precision-machined joints ensure that any internal ignition is contained and cannot propagate to the surrounding atmosphere.
Q2. What gas groups do Trimiti's junction boxes cover?
Our junction boxes are suitable for Gas Groups IIA, IIB, and IIC — covering the full range of industrial explosive gases from propane and LPG (IIA) to ethylene (IIB) and hydrogen/acetylene (IIC).
Q3. How many cable entries can be provided on a single junction box?
We offer junction boxes with 2, 4, 6, 8, or more cable entries depending on the model. Custom entry configurations are available on request to match your specific cable layout.
Q4. Do you also supply the cable glands for junction boxes?
While we specialise in junction box manufacturing, we can recommend compatible certified flameproof cable gland suppliers. Please discuss your cable types and sizes at the time of ordering for guidance.
Q5. Can junction boxes be supplied with terminal blocks already installed?
Yes. We can pre-install DIN rail mounted terminal blocks, earth terminals, and labelling strips inside the junction box, ready for direct field wiring upon installation.
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