An automatic transfer switch consists of an electrical power control device that reroutes electricity under certain power conditions. It enables the safe switching of power from one source to another. Consequently, this ensures a safe and reliable transfer of power while minimizing the risks of fire, damage, or back feeding of power to the utility lines.

An ATS ensures continuity of power to the load. However, the time between loss of power in the utility line and the time the load is connected to the alternative power source remains critical in some applications. For example, a power loss for a few seconds is unacceptable in some hospitals or with emergency equipment. In some of these installations, an intermediate power supply is utilized. These include the battery-based inverter or UPS power to fill the gap between the loss of power and connection to the generator power.

Advanced ATS devices may have the ability to detect the voltage dips characteristic of power failures and automatically start the generator before the utility power goes off completely.

Consumers need to ensure that the ATS will have adequate capacity to handle the generator power. Things to consider include the voltage rating, continuous current rating, and type of load. In addition, consider the mode of transfer, desired transfer time delay, ATS style, and more.

The four main categories of ATS devices are defined by the following transition modes.

Open-transition: The open transaction mode of operation disconnects the primary power before connecting the power from the secondary source. This break-before-make operation means a short duration when there is no connection to either of the power sources.

Fast closed-transition: The ATS is based on the make-before-break switching operation. It parallels the two supplies for about 100 milliseconds after which it disconnects one of the sources. This operation ensures that the load is never disconnected from power.

Soft closed-transition: The soft closed-transition transfer synchronizes generator power with the utility line and then transfers the load from the utility to the generator. When transferring the load back to the utility, follow a similar process.  In this case, the generator output slowly decreases until completely off.

Sub-cycle transfer: These are based on semiconductor switches and are the fastest automatic transfer switches. Upon detecting a power failure, the ATS transfers the load to the other source within the first one-quarter of the electrical cycle. This ensures no power interruption to the load. Sub-cycle ATS devices are the most complex and expensive compared to those using mechanical switches.

Since consumers may not have all the necessary technical knowledge to choose the correct application, it can be a good idea to hire a qualified electrical contractor to select the correct sizing and installation.

Whether you have a scheduled lighting project or an emergency on your hands, there are plenty of situations when it’s appropriate to call in a local electrician for the job.

Repairing a Wire Damaged from Drilling a Hole in the WallWhether you’re hanging pictures, shelves or a TV mounting bracket—or any other reason you might be drilling into a wall—there’s always the possibility that you’ll hit and damage a wire. This is definitely a fix you want to leave in the capable hands of a certified electrician.

To prevent the problem from happening again, use a stud finder and aim for the center of the stud. Before drilling, use a small tipped screw driver to verify you are hitting the stud and not the side. Once you have verified, feel free to drill away.

For many people the basement is a place of escape and for others it is simply a place for storage. With all the room underneath you, you don’t want it to go to waste. Renovating your basement can greatly increase the value of your home if it is unfinished or in need of an update. One important point to remember is the electrical wiring hiding behind the walls.

If you bought your home and it was already finished, that work could have been done many years ago and you might be thinking it is time to update fixtures, paint, and maybe evening moving a wall. When you begin pulling things apart, be careful for loose or old wires. If the electrical work was not done right, there could be loose electrical wires that were not tied in properly.  The wiring can also be old and out of date. If you are moving walls or replacing fixtures and you are worried about the age of the wiring, have a licenced electrician come to inspect your wiring. If you are going to go through the effort of redoing your basement you want to make sure it is done right.

For those who have an unfinished basement you have a clean slate to work from. Once you start putting up the framing for rooms, you can start on the electrical rough in. This is the foundation for the electrical wires, which includes drilling holes in the framing and running the wires to where they need to go. If this is not done correctly it could leave you with a significant headache once your drywall is up and you have to punch a hole in the brand new wall.

When you are planning out your new layout, make not of where each outlet, light switch, and light fixture will be placed. This will help you plan out the electrical rough-in. If you have reached this point in your basement renovation and don’t know where to go from there – contact Expert Electric. Our electricians can help you with the planning and running the wires through your basement.

Most electrical panels are located in the basement. Prior to your renovation, you probably could easily access the panel. When you are putting up framing and drywall, be sure to leave enough room around the panel for it to easily open. You also want to make sure not to cover it with furniture that could prevent you from accessing it quickly. In the event that you need to turn on a tripped breaker or even turn off a circuit in an emergency, you don’t want to be struggling with furniture to get the panel open.

Before you renovate your basement, have a plan and be prepared.