Not an electrical code issue

National Electrical Code

City of Greater Sudbury, Ontario, CA? The Municipal Bylaws (20-126095)(31-1) require installation and maintenance of all electrical supply connections within buildings to conform to the Ontario Electrical Code.

The National Electrical Code: http://www.nfpa.org/aboutthecodes/AboutTheCodes.asp?DocNum=70&cookie%5Ftest=1

Each country has its own electrical wiring code so it depends where the question comes from.