Fiberglass Enclosures
Fiberglass enclosures have a reputation for being tough and long-lasting handling many different kinds of environments. Their combination of extreme resistance to corrosion and good insulation properties makes them ideal for use in many outdoor and industrial situations, where electrical components are expected to work unfailingly, even when exposed to moisture, extreme temperatures, chemicals, and of course, sunlight.
The decision to use fiberglass instead of metal for electrical enclosures often rests on a few major benefits. Fiberglass is superior when it comes to withstanding corrosion, which makes it perfect for environments with high humidity, saltwater, or the presence of chemicals—any of which could easily eat through an average metal box over time. It's also much more electrical-insulation friendly than metal, thanks to being roundly nonconductive.
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FAQs
Is it easy to design custom enclosures using fiberglass?
Yes, it is pretty easy to design custom enclosures using fiberglass because of its flexibility in molding and shaping into various sizes and configurations.
Non-Metallic Enclosure Types
Characteristics of non-metallic enclosures:
NEMA 4x rating for outdoor use providing chemical resistance and protection from dust, debris, water and rain.
High insulation value, which provides insulation from cold and hot temperatures, but does not dissipate heat from inside the enclosure.
Non-conductive, meaning components cannot be grounded to the enclosure, but it still provides the product the same security and tamper resistance levels as metallic enclosures when properly locked.
Types of non-metallic enclosures:
Fiberglass
A thermoset polyester material reinforced with glass fibers. It is the most widely used non-metallic material in the industry. It has high impact strength and rigidity (dimensional stability), a superior working temperature range (-31˚F to 300˚F), excellent electrical properties, moisture and chemical resistance, as well as being cost effective.
Polycarbonate
High-performance thermoplastic resin processed by injection molding or sheet extrusion. It has superior impact resistance, good rigidity (dimensional stability), an extended temperature range (-31˚F to 180˚F), excellent electrical properties, fire retention, UV stability and corrosion resistance in some acidic surroundings. It is not suitable for environments with strong alkalis and organic solvents.
ABS or ABS blends
Acrylonitrile Butadiene Styrene is a common thermoplastic polymer processed by injection molding. It has high impact resistance, but less impact resistance in cold weather compared to polycarbonate, excellent electrical properties, superior chemical and moisture resistance, but a narrower temperature range than fiberglass (-40˚F to 248˚F).
Polyester
High-performance unfilled thermal plastic processed by injection molding. It has high impact resistance, but less impact resistance in cold weather than polycarbonate, excellent electrical properties, superior chemical and moisture resistance, but a narrower temperature range than fiberglass (-40˚F to 248˚F).