What does XHHW stand for?
High Heat-resistant Water-resistant
XHHW is an alphabetism or initialism which stands for “XLPE (cross-linked polyethylene) High Heat-resistant Water-resistant.” XHHW is a designation for a specific insulation material, temperature rating, and condition of use (suitable for wet locations) for electrical wire and cable.
What is the difference between XHHW and XHHW 2?
THHN/THWN-2 is a thermoplastic product, while XHHW-2 features thermoset insulation….HOW TO KNOW THE DIFFERENCE.
| THHN/THWN-2: | XHHW-2: |
|---|---|
| T = Thermoplastic | X = Cross-Linked Polyethylene (XLPE) |
| HH = High Heat Resistant | HH = High Heat Resistant |
| W = Water Resistant | W = Water Resistant |
| N = Nylon Jacket | (Not Required) |
How is cable dia calculated?
Divide the circumference of wires by 3.14, or Pi. The formula for figuring diameter from circumference is: circumference divided by Pi equals diameter, or C ÷? = D. Use 3.14 as a near equivalent of Pi for the conversion.
How do you find circular mils of a wire?
Multiply the width of the wire cross Multiply the width of the wire section in mils by the thickness of cross section in millimeters by the wire cross section in mils by the thickness in millimeters by 1.2732 and subtract the radius 1973.525 and subtract the radius factor included below.
What’s the difference between Thhn and XHHW?
XHHW-2 is rated up to 90° C in both wet and dry environments. THHN is rated up to 90° C in dry environments only. XHHW-2 is insulated with cross-linked polyethylene (XLPE), which provides a di-electric constant (k) value usually ranging from 2.2 to 3.0 megohms @ 20° C.
What is MCM in wire size?
circular mils
MCM is an abbreviation for thousands of circular mils, an old measurement of wire gauge. 1 MCM = 1 kcmil = 0.5067 square milimeters. A mil is 1/1000 inch.
What is CMA in wiring?
ALWAYS SELECT TERMINALS BY THE CIRCULAR MIL AREA METHOD. For example, a wire size 18 AWG 16-strand conductor (1600 CMA) and a wire size 16 AWG 19-strand conductor (2426 CMA) will have a combined total of 4026 CMA. This total CMA is equivalent to a wire size 14 AWG conductor.
What temperature is XHHW rated at?
XHHW-2 is rated up to 90° C in both wet and dry environments. THHN is rated up to 90° C in dry environments only. Dual-rated THHN/THWN carries a 75° C wet-environment rating. The 0.004” nylon jacket on the THHN is hydroscopic (that is, it absorbs moisture), which prohibits its use in wet locations at any temperature.
How do you calculate the diameter of a circle?
To calculate the diameter of a circle, multiply the radius by 2. If you don’t have the radius, divide the circumference of the circle by π to get the diameter. If you don’t have the radius or the circumference, divide the area of the circle by π and then find that number’s square root to get the radius.
What is half the length of the diameter of a circle?
It is half the length of the diameter of a circle, i.e., Radius = Diameter/2. The diameter of a circle is a line segment that passes through the center of a circle and has two endpoints at the circumference. It is twice the length of the radius of a circle, i.e., Diameter = 2 × Radius. What Is an Example of a Diameter?
What are the three dimensions of a circle?
There are three dimensions most often used to describe a circle: The radius – the distance from the circle’s center or origin to the edge, one half the diameter The circumference – the length of the outside boundaries of the circle Starting from the diameter, you can easily find the other two.
What is the diameter of a circle with radius of 4CM?
The radius is the distance from the center of the circle to its edge. If the radius of the circle is 4 cm, then the diameter of the circle is 4 cm x 2, or 8 cm. If you know the circumference of the circle, divide it by π to get the diameter. but you should use your calculator to get the most accurate results.