Electromagnetic compatibility of technical equipment. Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148,5 kHz. Part 2-1. Mains communications equipment and systems operating in the range of frequencies 95 kHz to 148,5 kHz intended for use in residential, commercial and light industrial environments. Immunity requirements and test methods
Rectangular weld moulding boxes of cast steel elements having inside dimensions: length from 600 to 900 mm, width from 500 to 700 mm, height from 125 to 400 mm. Construction and dimensions
