by Joseph A. Perry P.E. | Aug 15, 2017 | Uncategorized
Family sues PSE, saying daughter, 18, was electrocuted while tubing the Puyallup River Originally published in the Seattle Times, August 8, 2017 at 9:36 am Updated August 8, 2017 at 9:33 pm Madeline “Maddy” Roskie, 18, of Pierce County, died on Aug. 2, 2014 while...
by Joseph A. Perry P.E. | Aug 5, 2017 | Uncategorized
UL Provides 1500-Volt PV Module Certification Many stakeholders look to increase PV modules to 1,500 volts, reducing labor costs and improving financial returns. The continued drive to lower the cost of large photovoltaic (PV) systems has designers, developers and...
by Joseph A. Perry P.E. | Jul 29, 2017 | Uncategorized
UL Warns of Counterfeit UL Marks on LED Driver (Release 17PN-09) (Version française) (Versión en español) NORTHBROOK, Ill., June 16, 2017 — The following is a notification from UL that the LED Driver identified below bears a counterfeit UL Mark. This LED Driver has...
by Joseph A. Perry P.E. | Jul 22, 2017 | Uncategorized
UL Warns of Potentially Hazardous Electronic Ballast (Release No. 17PN-02) (Version française) (Versión en español) NORTHBROOK, Ill., May 31, 2017 — The following is a notification from UL that the Electronic Ballasts identified below may pose a shock or fire hazard....
by Joseph A. Perry P.E. | Jul 15, 2017 | Uncategorized
UL Warns of Potentially Hazardous Direct Replacement LED Tube Lamps (Release No. 17PN-07) NORTHBROOK, Ill., July 5, 2017 — The following is a notification from UL that the Direct Replacement LED Tube lamp identified below bears an unauthorized UL Mark for the...
by Joseph A. Perry P.E. | Mar 17, 2017 | Uncategorized
Another GREAT article by Mike Holt as published in Electrical Construction & Maintenance. Don’t Let Voltage Drop Get Your System Down Do you know how and why to calculate voltage drop? Jun 1, 2004 by Mike Holt NEC Trainer / Consultant, Mike Holt Enterprises...
Recent Comments