ASCO Power Paralleing Switchgear & Controls in California

In the world of industrial facilities, you will find that multiple generators are required to provide sufficient energy for a large-scale operation. ASCO Power paralleling switchgear is designed to synchronize multiple generators so they can automatically share the power load, ensure unbroken progression in backup situations, and provide peak shaving power. In California, paralleling emergency generators are vital for hospitals, data centers, utilities, and manufacturing plants—especially in wildfire-prone or Public Safety Power Shutdown (PSPS) affected regions. Leddy Power, a California-based ASCO authorized dealer and systems integrator, designs, installs, and services ASCO paralleling control gear with full UL 891/1558 listing and NEC compliance.

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Technical Highlights

Synchronization Controls

ASCO’s Power paralleling switchgear will automatically detect phase, voltage, and frequency before engaging in parallel synchronization.

Load Sharing & Shedding

Distributes electrical load proportionally across generators. If loads spike, the system sheds pre-defined non-essential loads to prevent overload.

Closed-Transition Transfer

To prevent any downtime, the unit is set up to overlap during the switch away from the utility to the generator, avoiding any power failure.

UL Standards

Our switchgear meets UL 891 for low-voltage paralleling and UL 1558 for higher-voltage gear. All systems are factory-wired, UL-listed, and NFPA 70 compliant.

NEMA 1/3R/4X Enclosures

We provide multiple options for enclosures, depending on whether your installation is inside or outside; all enclosures come with seismic anchoring to adhere to California’s safety standards.

Remote Monitoring

Integrates with SCADA or BMS for status and control. Ideal for modern “smart” infrastructure.

California Compliance & Use Cases

In California, paralleling switchgear installations must adhere to:

NEC Articles 700/701

Governing emergency and standby power in commercial buildings. ASCO Power parallel switchgears adhere to the legally required standby system laid out in articles 700/701.

Seismic Anchoring

In California, heavy switchgear is anchored to meet CEC seismic standards

Wildfire Outages & PSPS

When your project is in a location that is considered high risk for power outages, like Los Angeles, Ventura, and Santa Barbara, generators capable of paralleling are crucial for critical facilities like hospitals, water treatment facilities, communication centers, and airports.

Air Quality Permits

Multiple generators may need South Coast AQMD or Bay Area Air District permits. Leddy Power offers Tier 4 Final aftertreatment systems for paralleling generators to meet strict emissions regulations.

Common uses for paralleling generators in California include powering hospitals, municipal water pump stations, data centers, and essential manufacturing facilities. The Leddy Power Team supports you with equipment selection and specifications to help meet code requirements.

Integration with Generators

Paralleling gear ties directly into standby generators. Leddy Power offers turnkey services such as:

Assessment
We will consider what your load profiles should be and how much power would be required to provide a reliable, seamless backup
Sizing
We specify ASCO switchgear rated for your total load and short-circuit current (commercial generators often 208–600V, 3-phase).
Installation
Our team at Leddy Power is expertly trained to manage busbars, breakers, and integration with your current configuration. All the enclosures and breakers we employ will match your site's NEMA rating and service entrance capacity.
Commissioning & Testing
Each system is tested with ASCO load-testing protocols to ensure safe parallel operation.

The Leddy Power Team supports you with equipment selection and specifications to help meet code requirements. Our expertise is supplying industrial generators and transfer switches for emergency backup power systems and mission-critical power needs.

Full-Service Expert Installation
Genuine ASCO Paralleling Switchgear & Controls
Preventative Maintenance Programs
2-Year/ 2,000-Hr Standby Warranty
24/7 Emergency Service Support

FAQ

What triggers the need for paralleling gear?

Large facilities with multiple backup generators (e.g.,>1MW loads) typically need paralleling for redundancy and efficiency.

Do you parallel different-sized generators?

Generally, generators should be of similar size and type.

What does UL 891/1558 mean?

UL 891 is the standard for low-voltage switchboards (under 600V), and UL 1558 covers medium-voltage switchgear. Both voltages are sufficient for safe operation during an emergency.

Is seismic certification required?

Absolutely. You will need to seismically anchor emergency and prime power generators to protect against earthquakes and maintain California building code compliance.

How long is maintenance downtime?

Paralleling generators allows for scheduled maintenance of individual units without disrupting overall power supply.

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