What factors are to be considered for selecting cable for wiring installation?

What factors are to be considered for selecting cable for wiring installation?

Cable size selection is based on three main factors:

  • Current carrying capacity.
  • Voltage regulation.
  • Short circuit rating.

What are the methods of cable laying?

There are five different methods of laying cables e.g. (a) Laying direct in ground, (b) Drawing in ducts, (c) Laying on racks in air, (d) Laying on racks inside a cable tunnel and (e) Laying along buildings or structures.

How far apart should cable supports be installed?

Article 336-18 stated that cable must be secured in place at intervals not exceeding 4.5 feet (1.37 m) and within 12 inches (305 mm) from every cabinet, box, or fitting. In the 1999 NEC1, a change was made to the temporary wiring section.

Is standard for cable selection?

Actual voltage drops in cables are given in V/km/A, in the cable manufacturer’s catalogues, for various types of cables. It is also given in Indian Standard IS 1255 (Code of practice for installation and maintenance of power cables up to and including 33 kV rating).

What are the requirements of cable?

In general, a cable must fulfill the following necessary requirements :

  • The conductor used in cables should be tinned stranded copper or aluminium of high conductivity.
  • The conductor size should be such that the cable carries the desired load current without overheating and causes voltage drop within permissible limits.

How do you select a cable?

Selection of Cable

  1. Cable derating amp should be higher than full load current of load.
  2. Cable voltage drop should be less than defined voltage drop.
  3. No. of cable runs ≥ (Full load current / Cable derating current).
  4. Cable short circuit capacity should be higher than system short circuit capacity at that point.

How many types of cable laying presents are there?

There are three main methods of laying underground cables, which are – (i) direct laying, (ii) draw-in system and (iii) solid system. These three methods are explained below with their advantages and drawbacks.

Which cable is useful for fertilizer and chemical industry?

PVC cable – solid and economical Cables with PVC sheathing are designed for use in areas subject to moderate mechanical stress and are especially suitable for use in the food industry. PVC cables are of medium mechanical strength and offer good resistance to different chemical agents.

What are 3 acceptable ways to support cable runs?

Typical cable-support systems include cable trays, ladder racks, enclosed wire pathways, clamps, rings, and fasteners.

What is the maximum distance between supports for non metallic sheathed cable?

NM-cable must be secured and supported every 4.5-feet (1.4-meters) by staples, listed cable ties, straps, hangers or similar fittings, or other similar fittings that are designed and installed so that they do not damage the cable.

How do I choose a power cable?

Is code for OFC cable laying?

Search HS Code

HSN Code Product Description
854449 Other:
8544499 Other
85444999 Other

What do you need to know about power cable installation?

POWER CABLE INSTALLATION GUIDE Cables installed into conduits or trays have installation parameters such as maximum pulling tensions, sidewall pressure, clearance, and jamming, which must be considered. Other installations, such as buried and aerial, have different installation parameters.

What are the IEEE Standards for power cables?

ICEA S-68-516, section 4.5, and IEEE Standard 635-1989, “IEEE Guide for Selection and Design of Aluminum Sheaths for Power Cables. 9. IEEE Standard 510-1992, “Recommended Practices for Safety in High Voltage and High Power Testing.” 10. IEEE Standard 400-1991.

Who should design and use power cables?

The design, con- struction, and use of power cable should only be undertaken by competent professionals in light of current- ly accepted design and engineering practices.

Is there a guide for laying cables and installation of sleeves?

A Guideline for Laying of Cables and Installation of Sleeves Accurate and faultless installation and assembly of cables and sleeves are prerequisites for a trouble-free operation. Who is Draka Communications?