About: http://webisa.webdatacommons.org/383390789

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	They said that the prefered connection to ground is a water pipe, building steel, a steel door frame or some other metal ground.
http://www.w3.org/ns/prov#wasQuotedFrom	electrical-contractor.net