The SIP-4 cable is a type of Self-supporting Insulated Overhead Wire used for low-voltage power distribution. Its name is an acronym for Self-supporting Insulated Polar wire, with '4' denoting its specific design type. A key feature of SIP-4 is that it does not have a separate messenger (load-bearing) wire; all the insulated conductors are self-supporting. The conductors are made of compacted aluminum and insulated with XLPE (cross-linked polyethylene).
Applications
SIP-4 cables are versatile and used for a variety of low-voltage distribution purposes, including:
- Powering end-consumer facilities and residential areas.
- Building lighting power grids.
- Laying on the walls of construction sites.
- Equipping branches from overhead power lines to transformer units.
Unlike other ABC cables that rely on a separate neutral messenger wire for support, SIP-4 relies on the combined strength of all its conductors. This makes installation faster and simpler in some cases.
SPECIFICATION :
| Specifications | |
| Permissible heating temperature of current-carrying conductors during overload mode (up to 8 hours per day) | 130°С |
| Permissible heating temperature of current-carrying conductors in case of short circuit with short circuit current flow up to 5 seconds | 250°С |
| Operating temperature | от -60 °С до +50 °С |
| Minimum wire laying temperature | -20 °С |
| Long-term permissible core heating temperature | +90 °С |
| Minimum bending radius when laying | 10 wire diameters |
| Minimum service life | 25 years |
Parameter
| Number and nominal cross-section of conductors, mm2 | Outer wire diameter, mm | Estimated weight of 1 km of wire / 1kg | Nominal insulation thickness |
| SIP-4 2х16 | 17.2 | 142.6 | 1.3 |
| SIP-4 2х25 | 19.8 | 205.5 | 1.3 |
| SIP-4 3х16 | 15.7 | 206 | 1.3 |
| SIP-4 3х25 | 18.1 | 292 | 1.3 |
| SIP-4 4х16 | 20.08 | 285.3 | 1.3 |
| SIP-4 4х25 | 23.9 | 410.9 | 1.3 |
| SIP-4 4х35 | 27.1 | 544.7 | 1.3 |
| SIP-4 4х50 | 30.9 | 730.8 | 1.5 |
| SIP-4 4х70 | 35.6 | 1014.1 | 1.7 |
| SIP-4 4х95 | 41.5 | 1358.5 | 1.7 |
| SIP-4 4х120 | 45.2 | 1683.2 | 1.7 |