Type G vs. Type G-GC Cable: Are They The Same?
Type G and G-GC are a subtype of mining and industrial cable that blends some of the best characteristics of portable power cables and heavy-duty industrial wires. Like portable power cords, they are flexible and perfect for use in different types of equipment. Like industrial wires, they are durable and suitable for harsh, heavy-duty use.
For the most part, Type G and G-GC cables have an almost identical structure. They both feature bare copper conductors, EPDM E insulation, and a CPE jacket. They are flexible, durable, and immune to moisture, ozone, abrasion, chemicals, UV, and flames. In addition, the cables have an impressive temperature rating of -40°C to +90°C for dry, and -40°C to +75°C for wet applications. The voltage rating is 2000 volts, and the electrical cables are frequently used for applications between 600V and 2000 V.
Both G and G-GC are used in oil drilling platforms and ships because they are perfect for water submersion as long as they are sealed properly. They are also suitable for a wide range of mining and industrial applications, including industrial equipment. G and G-GC are frequently used to supply power where ground wires are needed.
The Difference Between G and G-GC
G and G-GC are virtually the same cable except for one difference that has to do with the construction and is often important in the context of mining equipment.
Type G portable power and mining cable have four copper conductors and four ground wires. They provide the electrical current with a safe path to escape the electrical circuit. Type G-GC cable usually has three copper conductors, two ground wires, and an additional ground check. A ground check, or a ground monitoring conductor, is a special type of conductor that helps to check the continuity of a ground circle.
Why and when is a ground check conductor necessary?
In the sudden event of ground continuity loss, a ground check helps de-energize power conductors and prevent accidents. Suppose there is no ground check and the ground continuity is not maintained. In that case, individuals can get exposed to conductive parts of the cable not connected to the grounding circle and be electrocuted.
You can usually recognize a ground check conductor by its bright yellow insulation. Aside from G-GC, other types of industrial cables that use a ground check are SHD-GC and MPF-GC. A ground check is a necessity for many mining applications.
If you plan to use G or G-GC for mining applications, you should check if the mining equipment requires a ground check conductor for ground monitoring. Some types of equipment that require a ground check conductor are mine pumps and mine conveyors. If this requirement is in place, you should only use a G-GC cable. If there is no ground monitoring requirement, you can use both G and G-GC interchangeably, as long as they meet your needs when it comes to gauge and the number of conductors.