Manholes 6 : A manhole is the opening in the underground duct system which houses cables plices and which cablemen enter to pull in cable and to make splices and tests. Also called a splicing chamber or cable vault
US Department of Labor, Electric Power eTool: Glossary of Terms, Occupational Safety & Health Administration OSHA, Washington, D.C., USA 2010. https://www.osha.gov/SLTC/etools/electric_power/gl ossary.html, (OSHA/ Electr Pwr - Amer) {618}