Struggling to tell the difference between cable types ZR-KVVP and ZR-DJYPVRP?
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This post was last edited by Radita on 2017-9-13 at 16:46. For the two cable models ZR-KVVP-1KV and 2X1.5ZR-DJYPVRP 2×1.5mm2, I checked Baidu and found that ZR stands for flame-retardant, while K refers to control cables； V: Polyvinyl chloride insulation ； V: Polyvinyl chloride sheath ； P: Copper wire braided shielding ； ZR: Flame retardant; DJ: Computer cable; Y: Insulation material – polyethylene; P: Copper wire braided shielding; this indicates phase-by-phase shielding. V: PVC sheathing material; R: The cable conductor uses a Category 5 structure (soft conductor); P: Copper wire braided shielding, which indicates overall shielding (shielding is still required after the cable is assembled). These two look similar – are they the same? Is there still some difference? Are that type commonly used by design institutes these days? Why does our contractor say there is no ZR-DJYPVRP 2×1.5mm2 cable?
Instrument DJs use the prefix “DJ” more often, while in electrical and low-voltage applications, the prefix “K” is generally used
The former is a control cable, while the latter is a twisted pair cable for computers. With shielding.
To clarify for you, this ZR-DJYPVRP 2×1.5mm2 model of cable is definitely available. Your construction team may not be familiar with this type of cable; we use it on site
Let’s take two commonly used cables as examples: ZR-DJYYPR32 2x1.5, with one shielding layer. ZR-DJYPYPR32 2x2x1.5, split-screen plus summary screen. So I think what the original poster needs is the ZR-DJYVRP 2×1.5mm2, flame-retardant polyethylene-insulated, PVC-sheathed computer shielding flexible cable.
ZR-KVVRP is a control cable, typically used for digital signals; it has only one overall shielding layer. The specification is written as 2X1.5mm2, where 2 indicates 2 conductors, and 1.5mm2 refers to the cross-sectional area； Both ZR-DJYVRP and ZR-DJYPVRP are computer cables, typically used for analog signals. They have better resistance to interference compared to control cables. The former has only one overall shield, while the latter features a separate shield for each conductor plus an overall shield; the specification for the former is 1X2X1.5mm2, indicating 1 strand with 2 conductors, whereas the specification for the latter is 4X2X1.5mm2, indicating 4 strands with 2 conductors each. You can look at sample images to see the cable structure. The specification ZR-DJYPVRP 2×1.5mm2 refers to a split-screen total screen, and the specification should indicate “number of strands X number of cores X cross-sectional area”. 2X1.5mm2 is the specification notation for control cables
The ZR-DJYPVRP 2×1.5mm2 specification is available; it has been used in projects for analog meters or communication purposes； ZR-KVVP-1KV 2X1.5 is a control cable, mainly used in electrical control circuits. These two types of wires on site are quite easy to distinguish; the former has a multi-strand flexible core, while the latter has a single-strand rigid core. It can be purchased from regular trade suppliers; contacting the cable manufacturers directly will result in a lower price. The contractor said no, so it’s hard to say what the reason is. Here are a few things that come to mind: 1. He has already purchased the latter and doesn’t want to buy the former to avoid additional costs ； 2. There are no professional engineers in the field of instrumentation; they really don’t understand it, and there are also no supplier resources in this area ； 3. If the contractor makes the purchase, it was found during the price inquiry that there is a large difference in price between the two specifications; therefore, the bid price was likely based on the latter specification. If the former specification is used now, losses will be incurred.
Why does our contractor say there is no ZR-DJYPVRP 2×1.5mm2 cable? If the construction party really says that, it would be terrifying!
The ZR-DJYPVRP 2×1.5mm2 specification is available; it has been used in projects for analog meters or communication purposes； ZR-KVVP-1KV 2X1.5 is a control cable, mainly used in electrical control circuits. These two types of wires on site are quite easy to distinguish; the former has a multi-strand flexible core, while the latter has a single-strand rigid core. It can be purchased from regular trade suppliers; contacting the cable manufacturers directly will result in a lower price. The contractor said no, so it’s hard to say what the reason is. Here are a few things that come to mind: 1. He has already purchased the latter and doesn’t want to buy the former to avoid additional costs ； 2. There are no professional engineers in the field of instrumentation; they really don’t understand it, and there are also no supplier resources in this area ； 3. If the contractor makes the purchase, it was found during the price inquiry that there is a large difference in price between the two specifications; therefore, the bid price was likely based on the latter specification. If the former specification is used now, losses will be incurred. Agree with this view
It has been resolved. Sometimes it seems like the contractors always make strange calls. I really can’t hold on anymore. Maybe if I write it more clearly next time, this kind of situation won’t occur: ZR-DJYVRP 1×2×1.5mm2, ZR-DJYPVRP 2×2×1.5mm2