et cetera... a blog of bright ideas from ETC

Switching

Why are fuses required with a BCELTS?

By Steve Terry 25-Oct-2019

In North America, emergency transfer switches, including the new Branch Circuit Emergency Lighting Transfer Switch (BCELTS), have tough testing and short circuit current requirements for a reason. Here’s what you need to know about the major difference between ETC’s SC1008 BCELTS and other...

Electrical diversity, revisited

By Steve Terry 15-May-2018

Electrical diversity is a requirement in most entertainment lighting systems, but one that is often well-hidden from users. This post will explore diversity requirements and what they mean to lighting users.

What is a “Directly Controlled Luminaire,” and why should I care?

By Steve Terry 9-Nov-2017

Recent changes in the US National Electrical Code and UL standards have significantly changed the rules for emergency lighting in the US. We explore those changes in this blog.