Asco Power Technologies Welcome Nc

Getting Started with Asco Power Transfer Systems in North Carolina

I spent about three years dealing with generator tie-ins across the state before I stopped second-guessing myself on basic setup decisions. Most people approaching Asco Power Technologies equipment run into the same handful of problems. The wiring diagrams look straightforward until you are actually standing in front of a panel at two in the morning. This guide covers what you need to know before you open the box. Asco Power Technologies manufactures transfer switches and power management equipment that has been around since the 1920s. The company went through some ownership changes and is now operating under the Schneider Electric umbrella, but the core products remain largely the same. You will find their equipment in hospitals, data centers, industrial facilities, and increasingly in commercial building projects across North Carolina where reliability standards have tightened up.

Asco Power Technologies Welcome Nc

If you are coming from out of state or just starting to work with this brand, the learning curve is not steep but it is real. The controllers use proprietary logic in some older models, and the communication protocols vary between generations. Knowing which generation you are dealing with before you order anything will save you a trip back to the supplier. Here is the straightforward part of the process. You need to decide between a parallel switch and a standard automatic transfer switch for your application. Most residential and small commercial jobs in North Carolina only need a standard ATS rated for the amperage of the service. The bigger facilities with redundant generator setups sometimes require parallel switching. It sounds fancy but it mostly means two generators can tie into the same bus during a transfer event. Not every job needs it, and overspecifying here is a common mistake I see on contractor bids. The physical installation follows standard electrical codes. Mount the unit on a solid surface. Run your line-side and load-side conductors through the appropriate knockouts. Wire the generator control signals to the terminal block according to the diagram in the manual. The manual for most current Asco models is actually decent, which is more than I can say for some competitors. After the wiring is done, you set the delay timers. These control how long the ATS waits before initiating a transfer after a power loss is detected, and how long it holds on generator power before returning to utility. The defaults in the factory settings are usually reasonable for standard applications but I always recommend tuning them based on your specific generator and load profile.

I ran into a problem on a project near Raleigh a couple years back where the transfer switch kept triggering a fault condition every time the generator came online. The error code pointed to an under-frequency condition, but the generator was pulling a solid 60 hertz on the bench test. We spent about forty minutes tracing wiring before I realized the frequency sensing input was wired to the wrong terminal pair on the controller board. The manual labeled terminals in a way that was easy to misread if you were not paying close attention. I ended up using a permanent marker to label each wire as I verified it against the schematic rather than trusting the print on the terminal block. That approach has stuck with me ever since. The communication side of things deserves a separate mention. If you need remote monitoring or integration with a building management system, you will be working with Modbus or BACnet depending on the controller model. The older Asco controllers used proprietary protocols that required special gateways. The newer units have moved toward standard protocols, which makes life easier if you already have existing BACnet infrastructure in your building. Make sure you verify protocol support before you order, because getting this wrong means returning equipment and waiting on a shipment that delays the whole commissioning schedule. North Carolina has specific electrical code requirements that affect transfer switch installation. The state follows a version of the NEC with local amendments, and inspectors in different counties can vary in how strictly they enforce certain provisions. In Wake County for example, they tend to be pretty thorough about grounding and bonding checks on standby power systems. In some rural counties you might get a quicker sign-off. The equipment itself does not change, but the inspection process does, and understanding your local jurisdiction ahead of time helps avoid surprises during final review.

One thing nobody tells you about Asco controllers is that the battery backup on the control board matters more than most installers realize. If your transfer switch is in an unconditioned space like a utility room or an exterior equipment pad, temperature swings will kill that battery faster than normal. I replaced a three-year-old controller board on a job in the Piedmont triad area and the battery was basically dead from heat exposure. The unit still worked but the backup memory was gone, which meant losing all the timer settings and event logs. Adding a simple thermostatically controlled heater pad or relocating the controller to a temperature-buffered area extends the life of that component significantly. Maintenance is another area where people cut corners. The manufacturer recommends annual testing with load banking for larger installations. Running your generator under no load for extended periods causes wet stacking, which is carbon buildup in the engine that leads to all sorts of problems down the line. If you have a generator larger than about 20 kilowatts, plan for a proper load bank test at least once a year. Some jurisdictions in North Carolina actually require documented load bank testing for certain occupancy types. Check your local fire marshal or building official before you assume it is optional. If you need documentation or product sheets, the Schneider Electric website has the most complete resource library. The Asco product line is split across several categories including automatic transfer switches, power interlock kits, and monitoring systems. Make sure you are looking at the right product family for your application. Interlock kits are not the same thing as automatic transfer switches, and using the wrong one for a permanent installation is a code violation in most cases.

The pricing landscape has shifted over the last few years as supply chain issues affected electrical equipment broadly. Asco units tend to run on the higher end compared to some domestic competitors, but the build quality and availability of replacement parts usually justify the premium for critical applications. For non-critical standby power where budget is the primary concern, there are alternative brands that perform adequately. Just don't expect the same level of controller sophistication or international service support with the budget options. I have found that keeping a spare fuse or two for the control circuit on hand is a small step that prevents a lot of headaches. The control fuses are generally standard sizes but they are not always stocked at your local electrical supplier. Ordering one extra when you buy the transfer switch takes thirty seconds and can save you a two-day wait if something blows three months after installation. Commissioning the system properly the first time eliminates most of the problems that show up later. Verify phase rotation before connecting any loads. Confirm the generator is producing the correct voltage and frequency under both no-load and loaded conditions. Run through a simulated utility failure to make sure the transfer sequence behaves as expected. Document everything with photos and notes. Future technicians will thank you, and if you ever need to troubleshoot an issue you will have a baseline to compare against.