Long Beach Apartment Complex Gets Full-Service Electrical Upgrade for Safer, More Reliable Power
Nov 03, 2025 | Electrical Rewire, Panel Upgrade
When it comes to powering multi-unit properties safely and efficiently, having a modern electrical system isn’t just a convenience — it’s essential. At Mario Castillo Electric, we recently completed a full-service electrical upgrade for an apartment complex in Long Beach, California, providing a safer, more reliable power infrastructure for residents and property managers alike.
The project included replacing the outdated electrical panel with a new 9-meter system and upgrading the main service line to 100 amps, meeting current electrical codes and supporting modern energy demands.

Upgrading for Efficiency, Safety and Compliance!
When we were called to action, the property required a significant electrical upgrade to meet the demands of its eight residential units. With the existing system struggling to support modern electrical loads, our mission was clear: install a new 9-meter panel along with a main line upgrade to 100 amps. This upgrade not only aimed to enhance electrical capacity but also to ensure safety and efficiency throughout the property. Our skilled team arrived on-site ready to tackle the project with precision. The first step involved careful planning and coordination to minimize disruption for the residents. We installed the 9-meter panel, ensuring that each unit had dedicated circuits that would allow them to power their devices safely and efficiently.
Over time, electrical panels and wiring can become stressed by increased appliance usage, HVAC systems, and modern technology. Aging panels not only affect performance — they can pose serious safety hazards such as overheating, electrical arcing, or even fire risks.
Upgrading to a new main service panel and wiring system ensures compliance with current California electrical codes and improves protection for residents. The new 100-amp service line provides the capacity needed for today’s energy demands while reducing the likelihood of tripped breakers and power fluctuations. This upgrade gives the property owner confidence that their system is safe, efficient, and future-ready.
Before and After Pictures
Blancing Efficiency, Reliability and Stable Power Distribution
We successfully completed the installation and the new 100-amp main line significantly increased the available power for all units, enabling residents to utilize their appliances and technologies. From air conditioning units to modern kitchen appliances, the upgrade has made a tremendous difference in residents’ daily lives.
In addition to safety, a new electrical panel offers measurable improvements in efficiency and reliability. Proper load balancing helps minimize wasted energy, while modern circuit components deliver smoother, more stable power distribution. This upgrade helps protect sensitive electronics and appliances from power surges and voltage inconsistencies — a key advantage for multi-family housing.
Expertise You Can Count On
The Long Beach project is a perfect example of Mario Castillo Electric’s commitment to quality workmanship and precision. Our experienced technicians handled every phase of the upgrade — from load calculations and permitting to installation, testing, and final inspection — ensuring the system met both safety and performance standards.
With years of experience serving LA County and Orange County residential and commercial markets, Mario Castillo Electric has become a trusted partner for property owners, managers, and developers seeking dependable electrical solutions. Whether you’re upgrading service panels, integrating solar systems, or enhancing property efficiency, our team delivers results that last.
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