Master the uniformly distributed load (UDL) in counterweight theatre rigging to prevent structural failure and ensure safe operations. This guide explains ANSI E1.4-1 batten performance criteria, UDL calculations, and best practices for riggers and technical directors.
Learn how working load limit (WLL) applies to theatrical rigging systems. Understand how it's calculated, where it’s used, and how it keeps your rigging safe under real-world conditions.
Complete guide to entertainment control cables: DMX512 (120-ohm, XLR-5), Ethernet (Cat5e/Cat6, T568B), and balanced audio (XLR-3). Covers impedance, pinouts, routing, and termination requirements.
Electrical knowledge is inseparable from electrical safety in theater. Learn the NEC Article 520 requirements, NFPA 70E electrical safety standards, grounding fundamentals, and lockout/tagout procedures.
Electrical knowledge is inseparable from electrical safety in theater. Learn the NEC Article 520 requirements, NFPA 70E electrical safety standards, grounding fundamentals, and lockout/tagout procedures.
Theatrical electrical systems are governed by NFPA 70 (NEC) Article 520, OSHA 29 CFR 1910 Subpart S, and multiple additional NFPA standards. This article explains the electrical code framework, theater-specific NEC requirements, UL listing, the role of the Authority Having Jurisdiction, and when licensed electrician work is required.
Grounding and bonding are distinct concepts with different purposes -- and confusing them causes real hazards. This article covers the NEC Article 250 framework, theater-specific Article 520 requirements, EGC impedance and fault current calculations, generator separately derived systems, GFCI protection requirements, outdoor wet-location grounding, and field verification methods including low-resistance ohmmeters, meogohmmeters, and ground loop impedance testers.
