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  1. Residential Electrical Forum
    I notice that my alarm panel is grounded to its own independent earth ground rod. Was this a matter of convenience, an attempt to create the shortest path, or an intentional effort to avoid grounding to service ground? Would it be ok to ground other non-electrical things to it such as an...
  2. Residential Electrical Forum
    Hi, I am a DIYer, have some electrical experience from flipping houses, and would like to think I am pretty good at picking things up. But I do have a question, or really a clarification that I need if I am thinking right on this project. We are adding a Nest Hello doorbell and the current...
  3. Canadian Electrical Forum
    I have a ground problem that I can't quite get my head around. I've installed a 50KVA 240 / 600V step up - step down system to get a 200A service into the back of a customers property. I don't have a lot of experience with transformers so I gave the local inspector a call to ask about grounding...
  4. General Electrical Discussion
    Hi Everyone, we are working on a very large exterior lighting conversation at an industrial site. Replacing 400W + 1000W HID fixtures w/ new LEDs. The problem is, the existing 40FT+ poles don't have an existing ground wire. To add a ground to these poles would require a $1M+ infrastructure...
  5. General Electrical Discussion
    Is it possible for there to be no ground wire in an under ground PVC feeder conduit? Its 480v 3 wire. Doing demo and noticed this between two buildings in an industrial compound (all on one property). Is this an ungrounded or impedance grounded system? Please be gentle I have limited experience...
  6. Canadian Electrical Forum
    Is it possible for there to be no ground wire in an under ground PVC feeder conduit? Its 480v 3 wire. Doing demo and noticed this between two buildings in an industrial compound (all on one property). Is this an ungrounded or impedance grounded system? Please be gentle I have limited experience...
  7. General Electrical Discussion
    Today i was trimming out a large house. There are two 3 way switches in a rec room that i have trimmed out. One side has a maestro dimmer by Lutron and the other side is a standard mechanical 3 way switch. The lighting is recessed cans by Halo. Once trimmed out and energized i notice i get a...
  8. General Electrical Discussion
    Hi, I just need some advice. I’m not an electrician, but I have a concern with my breaker box. I just bought my first house and we needed to get a new dryer. I noticed the dryer was hardwired into the breaker box. So I decide to get the proper outlet and supplies. Before doing so I researched...
  9. General Electrical Discussion
    I just had a electrical inspection today. Unfortunately i was unable to be there due to recent heart failure. My general contractor who is familiar with electrical met with the inspector. He called out that the water pipe which enters through the side of the foundation to be bonded. The entire...
  10. Residential Electrical Forum
    hi, i have a 2 gang meter box, siemens WP2211RJ, with 200 amp service. i have a 1/0-1/0-1/0-2 to downstairs 125a breaker panel and a 2/0-2/0-2/0-4 derated (for attic heat) feeder to the upstairs to a 125a lug panel. the installer cut off the ground on meter end of both SER's saying it was not...
  11. General Electrical Discussion
    I am currently building a motor starter for an industrial fan application. The fan is 480V, but the voltage is stepped down to 120V for the control circuit. The on/off button assembly is mounted to the door of the enclosure (120V supply). The enclosure that I bought (Wiegmann) is quite small...
  12. Residential Electrical Forum
    A customer has a panel where all the branch circuits are in copper NM with ground. However, there is no GEC, or water pipe bond in the service panel. In fact, there are no grounds larger than 12 AWG in the panel and they are all associated with the branches. I don't see any ground rods or water...
  13. General Electrical Discussion
    Hi to all members of these great Forums, Because this is my first Post in these Forums I will introduce myself a little. I have a Bachelor Degree in Biology and I am also a Carpenter. I become interested in Electricity since a few years ago, so last year I started to read a lot about...
  14. General Electrical Discussion
    Hi Everyone, I'm a hobbiest and a noob here, so please let me know if this is ok to post. I've been feeling current on my computer keyboard and a few other electric devices from an outlet. Went through the following steps: 1. Tested with an outlet tester and discovered that hot and neutral...
  15. General Electrical Discussion
    This debate was going around all day on the jobsite. I would like to hear your thoughts on either the ground up or down when installing outlets. https://www.youtube.com/watch?v=EmVH5En6x6o
  16. Structured Wiring
    I can't say that I have seen this before and am a little ashamed that I don't know the answer to this but here it goes: I ran into a primary panel today which had a 6/7 bare copper wire going from the telephone companies lightning arrestor directly to the ground bus inside the panel. I have...
  17. Business, Marketing, and Sales
    http://m.ecmweb.com/contractor/failures-outlet-testing-exposed By Adam Olson, Studio Prime http://m.ecmweb.com/contractor/failures-outlet-testing-exposed?page=3 About 10 years ago, I moved to a house five minutes from downtown Denver and decided to turn the upstairs into a recording studio...
  18. Residential Electrical Forum
    Hello, I am a newish owner of an old (1941) home in Oregon. I know next to nothing about electricity, but am here to learn! Hopefully, you will entertain my relative naivete of electricity and how it affects me in my new (old) home. My first question, if anyone would be so helpful to...
  19. General Electrical Discussion
    I need some help on power distribution on a marine vessel. When tied to shore power the system is 480/277VAC, 3ph, 4w solidly grounded. When the vessel is on generator power the system voltage is 480V 3ph, 3 wire ungrounded. The vessel has the typical 3 light system for detecting the first...
  20. General Electrical Discussion
    I have worked on machinery from Europe that has 2-wire grounded 240V in the panel. This is just like the 2-wire grounded 120V we use in the U.S. In other words, you have 2 wires coming off the secondary side of a single phase transformer at a potential of 240 V. One leg is grounded, giving you a...
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