09/04/2026
Balancing your load on a diesel generator is essential for keeping lights running, the crew safe, and the day on schedule. In this clip from our Generator Etiquette Masterclass, Shane Hurlbut, ASC and Gaffer Tom Sigurdsson walk through best practices for powering up HMIs and maintaining an even load across all three legs.
It starts with preparation:
• Label every component — A HMI to A head cable to A ballast — so if a unit will not strike, you can isolate the issue instantly.
• Warm up HMIs slowly (30–60 seconds), keeping ears and gels clear from the front.
• Use heat shields to protect gels from damage.
• Watch your meters — HMIs pull more amperage while coming to temp, then idle down.
• Balance the load by dimming other units up or down until all three phases are close in amperage.
In this scene, two 18Ks and a 20K are brought online in sequence, adjusting dimmers and monitoring readings until the red, blue, and black legs are perfectly balanced, then adding a final 18K for backlight without risking overload.
This masterclass covers:
• Generator placement, leveling & safety
• Load balancing & voltage for HMIs
• Battery vs diesel setups
• Preventing failure before it happens
• And much more
Now is the time to join. Our Annual Membership is $50 off and includes:
✓ This masterclass + 8 others
✓ Monthly coaching with working pros
✓ B&H EDU gear discounts
✓ On set access through the Shadow Program
Click the link in bio to save and join!