In BC an installation permit is required when any regulated product is installed including low voltage.
Exemptions from permit requirements cover replacement of receptacles, snap switches, fan controls, dimmers, ballast and cord ends. Maintenance items where a part is replaced by an exact match is also permit exempt except if a utility is not required to attend.
Replacement of 1 item by another where it is functionally the same but say of different models or manufacturer do require permits.
See the Safety Standards Act and the Electrical Safety regulation BC for legislation.
