The scope of this Recommendation is to provide working procedures for maintenance activities in specific environments for telecommunication plants with voltage levels higher than the limits defined for analogue PSTN circuits. The specific environments covered in this Recommendation are characterized by wet conditions or close proximity to exposed metallic parts.
ITU-T K.64-2011 Referenced Document
ITU-T K.50-2000 Safe Limits of Operating Voltages and Currents for Telecommunication Systems Powered over the Network Series K: Protection Against Interference Study Group 5
ITU-T K.64-2011 history
2011ITU-T K.64-2011 Safe working practices for outside equipment installed in particular environments (Study Group 5)
2004ITU-T K.64-2004 Safe working practices for outside equipment installed in particular environments SERIES K: PROTECTION AGAINST INTERFERENCE Study Group 5