Why does the photovoltaic DC system PV1-F/H1Z2Z2-K use only single-core cables instead of multi-core cables?

Answer:The PV1-F/H1Z2Z2-K photovoltaic DC system should use a single-core cable.

The reasons are as follows:

1. Photovoltaic systems operate on DC 1000V/1500V high-voltage direct current, where multi-core cables are prone to electric field interference and partial discharges, leading to prolonged insulation breakdown; Shenghua's single-core photovoltaic cables exhibit uniform electric fields and more stable voltage resistance.

2. Outdoor applications require an exceptionally long service life of 25 years. Shenghua single-core photovoltaic cables utilize irradiation-crosslinked weather-resistant materials, offering resistance to ultraviolet radiation, high/low temperatures, and aging; conventional multi-core outdoor cables are prone to cracking and premature aging.

3. The photovoltaic electrical code requires that positive and negative electrodes must be installed separately and independently; they must not share cables or conduits. Multi-core cables do not comply with safety wiring regulations.

4. The industry-standard red-black single-core color scheme (positive pole red, negative pole black) ensures clearer and safer wiring for installation, operation and maintenance, as well as fault diagnosis. Shenghua Cable uniformly adopts this standardized color coding system to facilitate on-site management and acceptance procedures.