What electrical work can I do legally in New Brunswick, Canada?
Here is the answer I got:

1)  First we have three types of installation as define by the definition in the Regulation 84-165.


  “type I installation” means the installation and repair of branch circuits, devices, motors and appliances on existing type II installations, including domestic ranges, water heaters and clothes dryers, but no alteration or addition, except for the installation of a domestic range, water heater or clothes dryer, shall exceed ten outlets or a total of five kilowatts;(installation de type I)
  
  “type II installation” means any electrical installation not exceeding two hundred amperes having a single phase supply of power less than three hundred volts between any two wires but possessing no features attributable to a type III installation;(installation de type II)
  
  “type III installation” means any electrical installation having one or more of the following features:(installation de type III)
      (a) requiring a three phase supply of power;
      (b) requiring a supply voltage exceeding three hundred volts between any two wires;
      (c) having a service entrance installation exceeding two hundred amperes in current capacity


2) Then the regulation 84-165 10(1) says that you must be an electrical contractor with a group 3 or 2 licence to do any electrical work on these type of installation.


  10(1)No person shall undertake to carry out
      (a) a type III installation unless he is the holder of a valid Electrical Contractors Licence Group 3 issued or renewed under this Regulation, or
      (b) a type II installation or a type I installation unless he is the holder of a valid Electrical Contractors Licence Group 3 issued or renewed under this Regulation or a valid Electrical Contractors Licence Group 2 renewed under this Regulation.


3) Also the regulation 84-165 11(1) says that you must have a valid N.B. electricians licence to work on an electrical installation.


  11(1)No person shall make, repair or maintain an electrical installation unless he is authorized by
      (a) a valid Electricians Licence Class 3 issued or renewed under this Regulation,
      (b) a valid Electricians Licence Class 2 renewed under this Regulation, or
      (c) a valid Industrial Electricians Licence issued or renewed under this Regulation.


4) So to summarize all this you must be a licence electrician working for an electrical contractor to performed any electrical installation or repair in the province of N.B. even replacing rec.,light switches, light fixtures etc.

As for the data/communication, it doesn't fall under DPS jurisdiction, so we can legally do anything data, phone or coax, which I wouldn't see why not.