controllers feature thermoset bodies to provide high resistance to
electrical arc tracking and ac-rated silver alloy contacts for excellent
conductivity and extended life. The compact devices are available in NEMA 1,
3/3R and 4X enclosures; each controller has lockout/tag out capability.
Toggle ac manual motor controllers feature quick-make/slow break operation
to provide reliability and long life. Each toggle switch controller has a
10,000A high-fault short circuit withstand rating, excellent dimensional
stability and superior dielectric strength. Optional NEMA 1 enclosures without
switches, as well as side guards for close wall applications and finger-safe
environments are also available.
Single-phase and three-phase toggle controllers are available in 30, 40 and
60A sizes, up to 600V ac, and 2-pole and 3-pole configurations. Designed with a
clamping plate for back or side wiring, toggle switch type controllers start at
Available enclosed toggle ac manual motor controllers feature NEMA 1 or NEMA
3R enclosures. NEMA 1 metal enclosed switch controllers, ideal for use in
indoor environments, are designed with 1/2 and 3/4 inch NPT wiring conduit
knockouts. The all-aluminum cover and base are designed with top, bottom or
back wire entry points; the base is pre-drilled for rear surface mounting. NEMA
1 enclosed toggle controller prices start at $27.50.
NEMA 3R rain-tight enclosed toggle controllers are available in either all-aluminum
or chemical and impact resistant thermoplastic enclosures, making them ideal
for outdoor applications. The all-aluminum enclosure, with pre-drilled base for
rear surface mounting, is designed with Â½ inch NPT wiring knockouts for 30A
models; 60A models feature Â¾ and 1 inch conduit knockouts. NEMA 3R enclosed
toggle controller prices start at $40.
NEMA 4X enclosed rotary ac manual motor controllers, ideal for heavy
washdown and corrosive environments, feature impact and chemical resistant
thermoplastic enclosure bodies. An over-center rotary switching mechanism
ensures reliable operation and allows positioning of up to two N.O. / N.C.
auxiliary contacts. NEMA 4X enclosed rotary controllers start at $99.
The promise of the Internet of Things (IoT) is that devices, gadgets, and appliances we use every day will be able to communicate with one another. This potential is not limited to household items or smartphones, but also things we find in our yard and garden, as evidenced by a recent challenge from the element14 design community.
If you didn't realize that PowerPoint presentations are inherently hilarious, you have to see Don McMillan take one apart. McMillan -- aka the Technically Funny Comic -- worked for 10 years as an engineer before he switched to stand-up comedy.
The first Tacoma Narrows Bridge was a Washington State suspension bridge that opened in 1940 and spanned the Tacoma Narrows strait of Puget Sound between Tacoma and the Kitsap Peninsula. It opened to traffic on July 1, 1940, and dramatically collapsed into Puget Sound on November 7, just four months after it opened.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.