The Function of a Hydraulic Elevator Power Unit

In simple terms, the power unit provides the force that lifts and lowers the elevator car. It consists of four primary components:

1. Tank (Reservoir): Holds the hydraulic oil that drives the system.
2. Pump: Typically a screw pump, it pushes oil into the cylinder to raise the elevator.
3. Motor: The submersible motor powers the pump, converting electrical energy into mechanical pressure.
4. Valve: The valve controls oil flow, ensuring smooth starts, stops, and leveling accuracy.

When the elevator is called to a higher floor, the pump forces hydraulic oil into the cylinder, raising the piston and car. When descending, the Maxton valve precisely releases oil back into the tank, allowing for controlled lowering.

This balance of power, flow, and control is what gives hydraulic elevators their signature smooth ride.

Why Quiet Operation Matters

While all hydraulic elevator power units produce some noise, CED Elevator & Electrical’s units are engineered to run quieter thanks to their construction. The reduced noise doesn’t come from the pump, motor, or valve alone — it comes from the way the entire unit is built.

Each tank incorporates welded Unistrut across the full width of the front and back to increase rigidity and reduce vibration. The ½-inch thick motor mounts are isolated and anchored to the Unistrut, minimizing vibration transfer through the frame. The thick-gauge steel tank features a flat bottom that holds more oil, improving sound dampening and temperature stability. Even the lid is engineered to avoid metal-to-metal contact, reducing resonance during operation.

These structural features significantly reduce noise and vibration. It’s one more reason installers and building owners appreciate the quality behind a CED Elevator & Electrical hydraulic power unit.

Reliability and Ease of Maintenance

Each component in a CED power unit is chosen for long-term reliability and easy serviceability. The steel tank design includes a hinged and shocked lid for one-hand opening, and a cutout for quick and easy access to the valve, while optional features like oil coolers, scavenger pumps, and pressure gauges make it adaptable to a variety of installation needs.

Replacement parts and support are available through CED Elevator & Electrical’s nationwide branch network, minimizing downtime and keeping maintenance simple.

Trusted Brands, Proven Components

Our units are built with components from some of the most trusted names in the elevator industry:

• Seim Pumps — known for precision, quiet operation, and long life.
• Imperial Electric Motors — delivering consistent performance and efficiency.
• Maxton Valves — the industry standard for reliability and fine control.

Together, they form a power unit that installers and technicians can depend on for years of service.

CED Elevator & Electrical: Your Source for Quality Power Units

As a leading supplier of elevator components, CED Elevator & Electrical provides complete hydraulic elevator power units designed for performance, quieter operation, and compatibility with a wide range of systems.

To explore our configurations and standard or optional features, visit our product page:
CED Hydraulic Elevator Power Unit

Whether you’re modernizing an existing system or planning a new installation, CED offers high-quality solutions built with trusted components and supported by our dedicated team.

CED Elevator & Electrical is proud to announce our newest offering: the Heavy Duty Elevator Scavenger Pump. Designed and built in-house, this unit provides elevator professionals with a dependable and cost-effective solution for fluid management in elevator pits. Even better, it’s now available at an unbeatable price.

What Is an Elevator Scavenger Pump?

An elevator scavenger pump plays a crucial role in keeping hydraulic elevator systems clean and safe. It removes oil and water that collect in the elevator pit and sends that fluid back into the system’s reservoir. As a result, the elevator continues operating efficiently without the risk of fluid-related malfunctions.

Why Choose a Scavenger Pump?

Installing a scavenger pump offers several key benefits. First and foremost, it supports compliance with elevator code requirements. Additionally, it helps prevent elevator shutdowns due to excessive moisture or oil buildup. Because of this, facilities experience fewer service interruptions and reduced maintenance costs.

• Code Compliance: Meets ASME A17.1 standards for hydraulic elevators, including Firefighters’ Emergency Operation (FEO).
• Flood Protection: Helps prevent elevator shutdowns due to oil or water in the pit.
• Reduced Maintenance: Minimizes the need for manual clean-up and oil replenishment.

How the System Operates

The pump activates automatically when needed. Specifically, a float switch detects fluid buildup in the pit. Then, the pump transfers the fluid through a check-valve system that prevents any backflow. Consequently, the elevator remains clean and fully operational without any manual intervention.

CED’s Heavy Duty Scavenger Pump Features

Our in-house pump kit is engineered with real-world elevator challenges in mind. Moreover, it includes everything technicians need for a smooth installation and long-lasting performance.

• 1/3 HP Motor: Pumps approximately 101 gallons per hour
• 5-Gallon Collection Bin: Heavy-duty plastic container with a clear lid for fast visual inspections
• Dual Float Switches: Redundant activation for added reliability
• Complete Kit: Includes 100 feet of tubing and a full-flow check valve

Best Practices for Installation

Proper installation ensures reliable performance. For that reason, follow these best practices to get the most from your scavenger pump system:

• Position float switches to avoid contact with debris
• Secure tubing to minimize movement and wear
• Keep the collection bin clear and check it during routine maintenance

Why Buy from CED?

CED Elevator & Electrical isn’t just a distributor—we’re engineers, builders, and elevator system experts. Because of this experience, we designed this scavenger pump to meet the needs of field professionals. Furthermore, we keep them stocked across our branches and ready to ship quickly. Whether you’re working on a new install or modernizing an existing system, our pump delivers excellent value and performance.

Ready to Order?

Our Heavy Duty Elevator Scavenger Pump is in stock and available now. To get started, contact your local CED Elevator & Electrical branch. We’ll help with pricing, specs, and installation advice to make sure your job runs smoothly from start to finish.

In this guide, you’ll learn how to select the right traveling cable for your elevator project. Additionally, we’ll highlight common mistakes, explain why code compliance matters, and recommend a trusted manufacturer. With the right cable, your elevator installation will perform efficiently and meet all safety expectations.

What Is Elevator Traveling Cable?

Elevator traveling cable is a flexible multi-conductor cable designed to move with the elevator car. It carries power, control signals, and communication data between the elevator controller and the moving cab. Unlike standard wiring, these cables are engineered to bend constantly without wearing out.

Typically, a traveling cable includes finely stranded copper conductors, shielded twisted pairs, coaxial lines, or fiber optics—depending on what the system requires. These elements are bundled together and wrapped in a flame-retardant outer jacket. As a result, the cable functions as the communication backbone of the elevator, allowing the cab to respond to every button press, sensor, and system call.

How to Choose the Right Cable

Choosing the correct traveling cable depends on your elevator’s design, features, and environment. The following sections explain the most important criteria to evaluate before you order cable.

1. Voltage and Power Needs

To begin, identify the voltage requirements for your elevator system. Most traveling cables are rated for 300V, which is suitable for lighting, control systems, and standard accessories. However, some elevators require cables or conductors rated for 600V to handle components like fans or high-output lighting.

Therefore, you should always check the voltage rating and conductor gauge against your system’s electrical load. Doing so ensures the cable won’t overheat or degrade from excess current. More importantly, it prevents long-term performance and safety issues.

2. Number of Conductors

Next, determine how many conductors your elevator requires. This includes wires for lighting, alarms, door sensors, intercoms, cameras, and access systems. For larger or more advanced elevators, the count may exceed 60 conductors.

Moreover, it’s smart to include several spare conductors in your design. These allow for future expansion and reduce the chance of needing to rewire later. Be sure to include a dedicated ground wire as well, since it’s required by code.

3. Signal Shielding

If your elevator includes data, video, or voice systems, shielding becomes essential. Shielded twisted pairs reduce electromagnetic interference (EMI), ensuring clean phone calls, stable video feeds, and noise-free intercom systems. Coaxial or CAT5/CAT6 lines are also common in elevators with CCTV or network-connected controls.

For that reason, always specify a cable that includes proper shielding for any sensitive components. Otherwise, performance issues may arise due to electrical noise from motors or nearby equipment.

4. Flexibility and Bending Life

Traveling cable flexes every time the elevator moves, which could be hundreds of times per day. Because of this, durability and flexibility are non-negotiable. Round traveling cables with finely stranded copper conductors perform well in these conditions.

Additionally, confirm that the cable’s minimum bend radius is compatible with the pulleys or loops in your hoistway. Cables that bend too tightly may wear out faster. By selecting cable designed for frequent bending, you’ll extend its life and reduce maintenance issues.

5. Elevator Travel Height

The total travel distance of your elevator directly affects your cable choice. For short and mid-rise elevators, jute-core cables usually provide enough support. However, high-rise elevators require steel-core traveling cables that support their own weight without stretching.

Furthermore, when installing cables in high-rise applications, you must use additional support methods such as saddles, clamps, or cable guides. These prevent excessive strain and ensure the cable stays in alignment over time.

6. Code Compliance

Beyond performance, safety and compliance are critical. In the United States, traveling cables must meet NFPA 70 (NEC) Article 620 and carry a UL listing as Type ETT. These certifications confirm the cable has passed flame tests and complies with durability standards.

Using a compliant cable not only ensures the job passes inspection—it also protects building occupants, your crew, and your reputation. As a result, choosing certified cable is one of the most important steps in the process.

Common Mistakes to Avoid

Even seasoned professionals sometimes make costly errors when selecting traveling cable. Below are common mistakes and how to avoid them:

Underestimating Conductor Count

One of the most frequent issues is underestimating how many conductors the system requires. For instance, failing to include a wire for a future card reader or camera could require installing an entirely new cable. To prevent this, always build in extra conductors for future needs.

Mismatching Voltage or Gauge

Choosing the wrong conductor size or voltage rating can lead to serious problems. For example, using an 18 AWG conductor for a fan motor might cause overheating or voltage drops. Always verify the electrical load and choose the right wire gauge accordingly.

Omitting Shielding

In elevators with communication lines, a lack of shielding leads to EMI-related issues. This might result in static on phone lines or distorted video feeds. Including shielded pairs or coax components helps maintain clean, uninterrupted signals.

Ignoring Travel Distance and Cable Weight

Some cables are only rated for short vertical runs. If you install a jute-core cable in a high-rise system, it might stretch or fail under its own weight. In contrast, steel-core cables are designed for longer runs and maintain performance without sagging or pulling.

Why Quality and Compliance Matter

Traveling cables are safety-critical components. Choosing a low-cost, non-compliant cable increases the risk of failure, safety violations, and costly rework. Conversely, selecting high-quality cable protects your crew, the elevator, and the building’s occupants.

Safety Standards

UL, CSA, and NEC-compliant cables meet strict fire, flexibility, and electrical performance standards. For example, cables rated UL VW-1 must pass vertical flame tests to ensure fire resistance. Compliance also protects you from legal or liability issues.

Long-Term Reliability

Premium cable manufacturers use better insulation, higher-quality copper, and more robust cable designs. As a result, these cables last longer, resist wear, and require fewer repairs. Over time, quality cables reduce service calls and lower total cost of ownership.

Inspection and Liability

Most elevator jobs must pass inspection. If the cable lacks UL certification or is visibly inappropriate for elevator use, inspectors will flag it. That can delay your project or force a costly redo. Therefore, always select certified cable with the required markings and documentation.

Why We Recommend James Monroe Wire & Cable

At CED Elevator & Electrical, we trust James Monroe Wire & Cable to deliver top-quality elevator traveling cable. Their products are built to meet demanding elevator industry requirements.

Key Features

• UL Type ETT rated (300V)
• High-flex stranded copper conductors
• Flame-retardant PVC jackets (VW-1 approved)
• Available in jute-core and steel-core construction
• Shielded pairs, coax, and custom options available
• Resists twisting and performs well in high-usage environments

Moreover, James Monroe cables come with all necessary certifications including UL, CSA, and RoHS. Installers often praise the cables’ consistency and ease of installation. By choosing a proven brand, you reduce risk and improve job performance.

Get What You Need—Fast

CED Elevator & Electrical stocks a wide range of James Monroe cables and accessories. Because we maintain local inventory, most orders ship same-day or next-day. This keeps your job on track and reduces costly downtime.

Additionally, our team understands elevator parts and logistics. We’ll help you match the right cable to your project’s voltage, length, and conductor requirements. You’ll receive expert service from quote to delivery.

Contact Us

Need help selecting the right traveling cable? Looking for fast turnaround and proven product quality? Contact CED Elevator & Electrical today. We’ll make sure you get the cable you need—on time and with confidence.

As a trusted distributor of elevator parts, we serve as the vital link between manufacturers and the companies that keep elevators running smoothly. In this blog, we’ll explore the important role of a distributor in the supply chain and how we add value to the elevator industry.

What Is a Distributor’s Role?

Distributors act as intermediaries between manufacturers and end-users. We procure parts from trusted suppliers and ensure they are readily available to meet the demands of maintenance providers, contractors, and elevator service companies. Without distributors, the supply chain would become fragmented, leading to delays, inefficiencies, and increased costs.

For the elevator industry, the role of a distributor involves:

1. Stocking a Comprehensive Range of Products
   Distributors maintain an inventory of essential parts, such as controllers, motors, doors, and other components required for maintenance, repair, and modernization. At CED Elevator & Electrical, we carry thousands of high-quality products to ensure our customers can find exactly what they need, when they need it.
2. Ensuring Fast Delivery
   Time is critical in elevator repairs and upgrades. Delays in sourcing parts can lead to extended downtime, inconveniencing building occupants and service providers. With strategically located distribution centers across the U.S., we ensure fast and efficient delivery, so you never have to wait long for critical parts.
3. Providing Expert Support
   Distributors bring extensive product knowledge to the table. At CED Elevator & Electrical, our team works closely with customers to help them find the right parts for their specific needs. Whether you’re dealing with a routine maintenance job or a major modernization project, we’re here to assist you every step of the way.
4. Building Vendor Relationships
   We maintain strong partnerships with leading manufacturers, ensuring consistent access to high-quality products. These relationships also allow us to offer competitive pricing, passing the savings along to our customers.

Why Are Distributors Essential for the Elevator Industry?

The elevator industry is unique in that it relies on highly specialized parts, often designed to work with specific systems. Additionally, elevators operate in safety-critical environments, making reliability and quality non-negotiable. Here’s how distributors make a difference:

• Bridging Supply and Demand: Manufacturers focus on producing elevator parts, but they often lack the infrastructure to reach end-users efficiently. Distributors fill this gap, ensuring parts are available locally and immediately.
• Reducing Costs: By purchasing in bulk and managing inventory, distributors help reduce costs for end-users.
• Custom Solutions: Distributors like us offer tailored solutions, such as kits for specific upgrades or modernization projects, to simplify complex processes for our customers.

The CED Elevator & Electrical Advantage

At CED Elevator & Electrical, we go beyond simply supplying parts. We’re committed to being a strategic partner in your success. Our mission is to provide exceptional service, superior product quality, and unbeatable convenience. With decades of experience, we understand the unique challenges of the elevator industry and strive to provide solutions that help our customers thrive.

Here’s what sets us apart:

• One-Stop Shop: From routine maintenance to large-scale modernization, we’ve got all the parts you need in one place.
• Nationwide Reach: With distribution centers strategically located across the country, we can deliver quickly and efficiently.
• Expertise You Can Trust: Our knowledgeable team is here to support your business, helping you find the right parts and solve challenges with ease.

Conclusion

As a distributor, CED Elevator & Electrical plays a pivotal role in keeping elevators running smoothly across the U.S. By acting as the bridge between manufacturers and service providers, we ensure that parts are readily available, affordable, and reliable. Our dedication to customer satisfaction and efficiency drives us to deliver the highest-quality solutions for our clients.

If you’re looking for a trusted partner in elevator parts distribution, contact us today. Let us help you streamline your operations and keep your elevators moving.