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Cable trays are used as an alternative to open wiring or electrical conduit systems, and are commonly used for cable management in commercial and industrial construction. They are especially useful in situations where changes to a wiring system are anticipated, since new cables can be installed by laying them in the tray, instead of pulling ...
IEC 61537 Cable management – Cable tray systems and cable ladder systems; IEC 61540 Electrical accessories – Portable residual current devices without integral overcurrent protection for household and similar use (PRCDs) IEC 61543 Residual current-operated protective devices (RCDs) for household and similar use – Electromagnetic compatibility
Ladder line is an older, simpler form of parallel-wire line, often called open wire line. The configuration looks like a rope ladder , hence the name. It can either be purchased already made by a cable company, or home-made ; the construction is easy, though tedious, and originally all radio amateurs made their own open wire line.
Process Equipment Subgroup: Division 40 — Process Interconnections; Division 41 — Material Processing and Handling Equipment; Division 42 — Process Heating, Cooling, and Drying Equipment; Division 43 — Process Gas and Liquid Handling, Purification and Storage Equipment; Division 44 — Pollution Control Equipment
Construction equipment rental companies (1 C, 14 P) E. Engineering vehicles (11 C, 92 P) H. Heavy equipment (4 C, 22 P) M. Construction equipment manufacturers (4 C ...
Construction contract procedures (VOB) – Part C: General technical specifications in construction contracts (ATV) – Installation of air conditioning systems Active DIN 18382