The electrical inspector’s voice and input into the affairs of the industry is vital.
What should happen when the electrical utility or a utility customer decides to convert the ungrounded 600 volt, 3-wire supply to a 600/347 volt, 4-wire, solidly grounded electrical supply?
UL does evaluate the manufacturer’s installation instructions provided with UL certified products.
A National Standard of Canada, CAN/CSA-B72-M87 Installation Code for Lightning Protection Systems provides guidance on lightning protection.
The new Section 210-12 of the 1999 National Electrical Code (NEC) requires arc-fault circuit-interrupter protection for some branch circuits. Does UL List such devices?
This editorial will focus primarily on electrical inspector certification and recertification in the United States for the purpose of covering proposed changes that will affect the IAEI program in the US.
In this article, we will cover some of Canadian Electrical Code requirements for standby power and transfer switching.
Can a UL Listed product be modified in the field if the manufacturer indicates that the revision is ok and sends out new parts?