Price (Per FT.)
How to identify shielded tray cable POS (paired overall shield) and SPOS (shielded pairs overall shield)?
It is necessary that you are able to identify your cables so that you can make informed choices, especially when you want to place an order. First of all you must know about the wire size, which will tell you how big the conductor is and it is measured in AWG (American Wire Gauge). The insulation for the conductors will usually come in EPR or PVC. POS cables will have an overall shield while SPOS will have shielded pairs with an overall shield.
Are POS/SPOS shielded tray cables the right choice for a conduit system?
Yes, they are but there are also many other cables available in the market that are suitable for a conduit system. However, these cables are economical and they come with a sheath that is virtually impermeable. Most of these cables come with PVC or EPR with TC-ER, individual shielding that comes with 100% coverage.
What are the different types of shields of POS and SPOS cables?
There are different types of shields available for both the POS and SPOS cables. The most common types of shields available in the market are the PVC flame retardant ones. You might also see ones with “ER” (Extended Run) which will have the same crush and impact specifications as that of an UL Type MC cable. You can also find TPE, EPR, CPE and Haloarrest jackets for shielded tray cables.
Why is an overall shield important?
An overall shield will be considered important only when the shielded tray cables are used under the following conditions –
What is the difference between a POS and SPOS?
POS simply means that the cable has a single pair with an overall shield or jacket. While SPOS is a cable that has shielded pairs that in turn are covered with an overall shield or jacket. Both types are used for wet and dry locations and also for any type of indoor and outdoor applications.
Is the insulation thickness a vital deciding factor for choosing a shielded cable?
The insulation thickness is a deciding factor for any type of cables, regardless of whether they are shielded or unshielded. It pertains to the conductor specifications, the voltage that it will be required to work under and the strength of the cable. Also, when the insulation is thick, it will affect the flexibility of the cable.