1.What Is NYY Cable?
Like it’s other family members in NYY cable family, NYY O cable is extensively used in power transmission and distribution application. Each of the letters in “NYY” designates the real NYY cable meaning, which is:
N, stands for Copper core
Y, designates a PVC insulation (inner)
Y, identifies a cable with an outer PVC installation
Using these abbreviations, it’s easy to understand the NYY cable meaning to be a cable with one or more PVC-insulated copper core, with an insulated outer PVC sheath. Both Y’s is the abbreviation for the NYY cable specification specify PVC – one for the inner core sheathing, and the other for the exterior sheathing. The “N” designates a cable with copper core.
Remaining within the NYY family of cables, there are other cables that also denote their unique specification among that hierarchy of cables. For instance, you may come across an NYA cable. In this instance, the designation of the first two letters is the same – it identifies a PVC insulated copper core cable. However, the “A” in the NYA cable specification identifies that this is a copper core cable with a single copper core, and has only a single PVC insulated layer.
2.What Does NYY Cable Stand For?
Before deciding on which type of copper core, PVC cable to use, it helps to understand the various classifications of the NYY. In the electric cabling lettering system, NYY cable specification refers to the following:

N = Means the cables have a copper core
Y = Means the cable has an inner PVC insulation; and
Y = Refers to outer PVC insulation
The NYY cable, are typically unarmored cables. Like many in the NYY-family of products, are used for power supply in underground, indoor, concrete, water-based and other static applications. where there’s minimal risk of mechanical damage to the cable.

3.What Is NYY-J Cable Used For?
When understanding what the NYY j cable is used for, it helps to put this type of cable in perspective with another cable in the NYY J cable family – the NYY O cable. First, let’s look at the common lettering in these cables, which is “NYY”. In this format:

N = The “N” indicates that the cable is manufactured with a copper core
Y = The first “Y” highlights the inner insulation type. In this case, it indicates the cable has an inner PVC insulation; and
Y = The second “Y” tells electricians and engineers more about the outer insulation that this NYY cable has. In this instance, it refers to a cable with an outer PVC insulation

4.NYY Vs NYM Cable?
Both, the NYY cable as well as the NYM cable are part of the NYC cable family. The NYM cable family includes products with a copper core and single or more than one core cable that’s shielded by an outer PVC sheathe. These cables are typically used for applications in the 0.6kv to 1kv range.

The NYM cable, on the other hand, indicates a similar copper core cable with PVC insulation. However, the “M” in the NYM cable meaning signifies more than a single cable core inside the external PVC sheathe. So, an NYM 1.5 cable may have several 1.5-gauge NYY cables holstered inside an external PVC casing. These cables are typically used in applications of between 300v versus 500v.

Within the NYY and NYM cable families, there are additional types of cables, for instance, cables with a “j” or an “o” class. As an example, the NYY-j cable and NYMJ cable uses a green/yellow earthing or ground wire. Compared to that, NYM-o and NYY-o cable doesn’t use that additional earthing wire.
5.Getting The Best NYY Cable Value For Money
Sometimes, it’s tempting to look at an NYY cable price list and think there’s value in making a purchase. However, a simple price check is no way for electricians and engineers to ensure they’re receiving value for their NYY cable purchases. True value for money comes from more than what a sticker price offers.
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