IEEE Std 532 pdf free download

IEEE Std 532 pdf free download.Selecting and Testing Jackets for Power, Instrumentation, and Control Cables.
6.2 Jacket design configurations for shielded power cables
6.2.1 Overlaying jacket design
The overlaying (sleeved) jacket design uses a separator layer (polymeric film or metallic tape). The jacket is extruded over this layer. This approach provides a cable that has minimal neutral indentation into the insulation shield, easier jacket removal, and improved cable flexibility.
Overlaying jackets can allow water to enter and flow within the void spaces between the jacket and the cable core (via open cable ends and jacket breaches as a result of electrical. mechanical, or chemical damage). For applications where water ingress is an issue, this deficiency can be overcome by the incorporation of water- blocking materials to impede longitudinal water movement. Most commonly, water-swellable tapes, yarns. powders. or a combination thereof, are applied to achieve water-blocking.
Removal of the overlaying jacket can be facilitated even more by incorporation of ripcords under the separator layer. thereby reducing the need for cutting tools.
6.2.2 Extruded-to-fill jacket design for concentric neutral cables
For concentric neutral cables, an extruded-to-fill (encapsulated) jacket is a design option that can be used to reduce water ingress (see Marciano and Cinquemani [[363]). In this design, the jacket is extruded in such a manner as to fill the spaces over and between the neutral wires or straps. This approach provides a cable that has minimal water ingress, allows higher sidewall bearing pressure during installation, and allows pulling concentric neutral wire to facilitate jacket removal.
Extruded-to-fill jacket design can result in more indentation of the insulation shield by the neutral wires, more difficulty in stripping the jacket. and a reduction in cable flexibility.
The specifications for underground distribution cable have requirements on the depth of the indentations of the neutral wires into the semi-conducting insulation shield of the cable. The indents could potentially make it more difficult to strip the insulation shield during termination or splicing operations
The stripping of the extruded-to-fill jacket and the flexibility of the cable is complicated by the filling of the spaces between and around the concentric neutral. Removal of the extruded-to-fill jacket can be facilitated even more by incorporation of ripcords, thereby reducing the need for cutting tools. For applications where water ingress is an issue, this can be overcome by the incorporation of water-blocking materials to impede longitudinal water movement. Extruded-to-fill jackets can be longitudinally water-blocked by incorporating water-swellable powder under the jacket layer. Cable flexibility can also be improved when incorporating a longitudinal water-swellable tape over the concentric neutral layer.
6.3 Jacket design configurations for low-voltage power, control, and instrumentation cables
6.3.1 Overall jacket on multiple conductor cables
The most common jacket design used for multiple conductor cable is an overlaying (sleeved) jacket. The jacket is extruded directly over a longitudinally applied or helically wrapped tape, which overlays the cable core. Generally, the cable core binder is a polyester film tape, a coated fabric tape, a binder string, or the cable jacket can be extruded directly over a metallic or metalized polyester shielding tape (especially for instrumentation cables).
The overlaying design provides stable jacket thicknesses, good flexibility. and case of removal as ripcords can be incorporated into the design beneath the jacket.
IEEE Std 532  pdf download.