[Amps] What is it called?

[Tomm Aldridge]

Hal,

If it is not very flexible it is a reinforced epoxy / fiberglass 
composite material with random fiber orientation.  Generally known as 
GP03 (a NEMA designation).  Garolite(r) is a trademark above several 
types of reinforced materials, not including GP03.  Note that only the 
glass reinforced composites are recommended for primary insulation, not 
teh linen, paper or cotten types.  Best source for all in small 
quantities is McMaster-Carr.

Tomm

Data:
More About Electrical-Grade Fiberglass (GP03)
Sheets and Strips
Common applications for this material include electrical enclosures, 
electrical switch gears, bus bars, transformers, plus electrical
insulation and barriers.
Meet the following standard: UL 94V0 for flammability.
Tensile Strength: 10,000 psi per ASTM D638
Impact Strength: 8.2 ft.-lbs./in. per ASTM D256
Dielectric Strength: 400 V/mil per ASTM D149
Tracking Index: 500 volts per ASTM D3638
Hardness: Barcol 50 per ASTM D2583
Coefficient of Thermal Expansion: 1.11×10-5 in./in./°F per ASTM D696
Weather Resistance: Use indoors. Not intended for long-term outdoor 
exposure.
Processing: Machinability: Can be easily machined with carbide or 
diamond-tipped tooling. Holes are easily
created using conventional drill bits and milling bits. A dust mask and 
gloves
should be worn when working on this material.
Molding: Not recommended.
Welding: Not recommended.
Thermoforming: Not recommended.
Scratch Resistance: Fair.
Chemical Resistance: Use with mild detergents. Do not use with strong acids.

Harold B. Mandel wrote:

> Sirs,
> 
> There is a material that is supplied in sheets of varying
> thicknesses, colored red, that makes excellent insulating 
> boards. 
> 
> Does anyone know its trade name or who sells it?
> 
> Thanks,
> 
> Hal Mandel
> W4HBM
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