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Overhead service with a mast is common in Willow Glen's suburban setting. The meter should be easily accessible for PG&E readings, typically on an exterior wall. Transformers are usually pole-mounted and shared with neighbors. Ensure tree branches are trimmed back from service drops to prevent interference. Underground service conversions are possible but require trenching and coordination with the utility. Either way, proper mast height and secure connections prevent weather-related outages.

A 100A service from 1975 with a potential Federal Pacific panel presents multiple challenges for modern upgrades. Federal Pacific panels have known safety issues with breakers failing to trip during overloads. Even if the panel were safe, 100A service lacks capacity for Level 2 EV charging (typically requiring 40-50A) plus existing household loads and a heat pump. A service upgrade to 200A with modern AFCI breakers would be necessary for both safety and capacity.

Your electrical system is now about 51 years old, which means it was designed for 1970s appliance loads. NM-B Romex from that era typically has 14-gauge wiring for 15-amp circuits, but modern 2026 appliances like microwaves, air conditioners, and computers draw significantly more power. This creates voltage drop on overloaded circuits, causing lights to dim. Upgrading to 12-gauge wiring on dedicated circuits can resolve these capacity issues while maintaining safety.

The flat terrain in Willow Glen generally supports good electrical grounding since soil conductivity is consistent, but it doesn't eliminate all issues. Overhead lines in valley areas can experience interference from heavy tree canopies during winds. Grounding electrodes should be checked for corrosion, especially in older homes. While the terrain itself isn't a major hazard, proper maintenance of grounding systems and tree trimming near service drops ensures reliable power delivery.

PG&E maintains generally stable power in the Willow Glen area with low lightning-related surge risk. However, flickering lights and device resets often point to internal wiring issues rather than grid problems. Loose connections in outlets or panels, overloaded circuits, or aging NM-B Romex can cause voltage fluctuations that disrupt sensitive electronics. Installing whole-house surge protection and addressing wiring deficiencies provides more reliable power for modern smart home systems.

Summer AC peaks strain the grid, while winter temperatures around 38°F can bring ice-related outages. For brownouts, consider installing a transfer switch with a portable generator to power essential circuits. Surge protection is crucial since brownout recovery often brings voltage spikes. Ensure your panel has adequate capacity for AC loads, and inspect overhead service lines for tree interference before storm seasons. These measures protect both your home and electronics.

Panel upgrades in San Jose require permits from the Department of Planning, Building and Code Enforcement and must comply with NEC 2023. This includes AFCI protection for most circuits and proper grounding electrode systems. As a CSLB-licensed electrician, I handle the permit paperwork and inspections. The process ensures your upgrade meets current safety standards, particularly important when replacing older panels like Federal Pacific units that may not meet modern code requirements.

For electrical emergencies like burning smells or power loss, we dispatch immediately from our base near the SAP Center. Using I-280, we can typically reach Willow Glen homes within 10-15 minutes. First priority is ensuring safety by identifying the source—often a loose connection or overloaded circuit—and making temporary repairs to restore power. Permanent fixes follow once the immediate hazard is controlled.