The Tranemo 5930 92 arc rated long johns are flame retardant base-layer underwear for electricians and authorised persons working where arc flash is a risk. Rated EBT50 7.0 cal/cm² to IEC 61482-2 Class 1, in a soft 235 g/m² Cantex JX fabric, sizes XS to XXXL in navy.
Tranemo 5930 92 Arc Rated Long Johns, 7.0 cal/cm²
The Tranemo 5930 92 is a pair of flame retardant long johns worn as a base layer under arc rated workwear. It carries an EBT50 rating of 7.0 cal/cm² and meets IEC 61482-2 Class 1, so it adds a tested layer of arc flash protection next to the skin for switching, testing and maintenance work in substations and switchrooms.
Base layers matter more than people think. A non-rated cotton or synthetic underlayer can ignite or melt in an arc event even when the outer garment holds. Wearing arc rated underwear beneath your arc flash protection clothing removes that weak link.
Fabric and Standards
The long johns are made from Cantex JX fabric at 235 g/m², with a limiting oxygen index (LOI) of 30.1%. The fabric is soft and breathable enough to wear through a full shift, which is the point: PPE that gets taken off protects nobody.
| Attribute | Detail |
|---|---|
| Product | Tranemo 5930 92 FR Long Johns |
| Arc rating | EBT50: 7.0 cal/cm² |
| Arc standard | IEC 61482-2 Class 1 |
| Heat and flame | EN ISO 11612 A1 B1 C1 F1 |
| Electrostatic | EN 1149-5 |
| Fabric | Cantex JX, 235 g/m², LOI 30.1% |
| Sizes | XS to XXXL |
| Colour | Navy (03) |
Applications
- Base layer under arc rated coveralls, jackets and trousers for MV and LV switching
- Substation and switchroom work where layered protection is required
- Data centre, pharmaceutical and industrial sites with arc flash labelling in place
- Cold-weather working where a thermal layer would otherwise be non-rated clothing
If you are unsure how base layers fit into PPE selection, our guide to selecting appropriate arc flash PPE explains the layering approach, and the what is arc flash page covers the hazard itself. Matching garments are in our arc flash underwear range.
FAQs
Can I wear these long johns on their own as arc flash PPE?
No. They are a base layer, rated EBT50 7.0 cal/cm² to IEC 61482-2 Class 1, intended to be worn under arc rated outer garments selected against the incident energy identified by your arc flash risk assessment or study.
What sizes and colours are available?
The Tranemo 5930 92 is available in sizes XS to XXXL in navy. Contact our team if you need guidance on sizing or on matching base layers to your existing arc rated workwear.
Not exactly what you are looking for? Contact us with your exact requirements, we’re happy to help.
TRANEMO 5930 92 ARC RATED LONG JOHNS - 7.0 CAL/CM²DATASHEET
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