About Specifications of photovoltaic panel connection wires in factories
What makes cable that is rated UL 4703 (also known as PV cable) a better choice than some other common cable ratings, such as THHN or USE-2? The term "PV wire" (photovoltaic wire) is often used to refer to USE-2 or THHN wire, the terms are not interchangeable. PV wire is specifically rated in accordance with UL.
Per the National Electrical Code, USE-2 wire is suitable for use in grounded PV arrays only. UL 4703 cable can be used within both grounded and.
PV wire is made up of stranded copper conductors, which makes it flexible. USE-2 wire is usually installed in locations where it is not subject to movement or mechanical damage, so.
PV cable is rated for 90°C in wet conditions and up to 150°C in dry conditions. USE-2 is rated for 90°C in both wet and dry conditions.
Both PV and USE-2 cable use thermoset insulation and jacket, typically XLPE (cross-linked polyethylene) or EPCV. The current construction requirements outlined by UL 4703 are as follows:Conductor size: 18 AWG through 2000 kcmilConductor material: copper, copper-clad aluminum, aluminumInsulation: XLPE, EPRVoltage: 600 V, 1 kV, 2 kVSunlight resistantTemperature rating: 90°C wet, 105°C dry, 125°C dry, and 150°C dryOptional direct burial ratingOptional multi-ratings: USE-2, RHW-2.
The current construction requirements outlined by UL 4703 are as follows:Conductor size: 18 AWG through 2000 kcmilConductor material: copper, copper-clad aluminum, aluminumInsulation: XLPE, EPRVoltage: 600 V, 1 kV, 2 kVSunlight resistantTemperature rating: 90°C wet, 105°C dry, 125°C dry, and 150°C dry.
Specification: UL 4703 (PV Wire) THHN (Building Wire) USE-2 (RHH/RHW Wire) Applications: Wiring solar panels. Underground service entrance wire for both grounded and ungrounded PV arrays. General purpose wiring for installation in conduit. May also be used in machine tool, appliance and control circuit wiring.
Wiring solar panels together can be done with pre-installed wires at the modules, but extending the wiring to the inverter or service panel requires selecting the right wire. For rooftop PV installations, you can use the PV wire, known in Europe as TUV PV Wire or EN 50618 solar cable standard.
TOPSOLAR® PV DC Feeder Aluminium cable is suitable for all types of underground and open air solar installations. This cable is recommended for connections between string boxes and photovoltaic inverters in large scale rooftops or ground farms. • Solar PV installations. • Heavy impact and armoured versions also available. CONSTRUCTION .
Nexans AmerCable’s Type PV is a single-conductor cable that meets the newest standards as introduced in National Electrical Code (NEC) Article 690. Applications include connection to module junction boxes; required cable routing in balance of system (BOS) integration; and where also allowed by the NEC.
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