aftermath of mayor mosconi and harvey milk. >> so we may be seeing more of these successor issues coming up, certainly something we do not want to legislate. i hope that we can trust people to be grown up about it, but if that is not the case, we can spell that out. >> going through the first time with little knowledge and information was difficult. now that we have got our record of how to do this, i think the next clerk and the city will be much informed with having our process and having our archives to look too. >> and that is how san francisco government worked out the kinks, twists and turns, bombs in the road, to select its new interim mayor, ed lee. san francisco's first asian- american mayor. >> this has been an unprecedented and historic transition of power here in san francisco. i am so happy the board of

supervisors came together to select an outstanding choice along many outstanding candidates to lead us over the next several years. >> over the past several months when this issue has come up, it had been agonizing. the board has been put into a difficult situation. there are a lot of differences of opinion on how to run the city, how to mass make a decision, who should be in place, 11 people to agree on that is a challenging thing. i think we have done the best we can do in the process, considering the difference of opinions. >> the people of san francisco can now choose their mayor, the direction they want to go. that is why this decision was so appropriate. >> the other big shock is that the moderates seem to have won this round. people thought, progressives have themselves on the board. there is no reason that they will not get together and take a noted leader who is a progressive to be interim mayor,

and then stayed there for another term. the great thing about being in term mayor is to get to run as an incumbent. the fact that the progressives could not get together to get somebody into office as interim mayor in their own self-interest was very surprising for a lot of us. >> what happened in the last month in city hall was an incredible show of democracy that was part policy, part politics, and it all came together, and more than anything -- not just from a reporter's perspective, often was this? but there was a public interest as well on what was going on in san francisco government. we take it for granted a law that there is a city government here. this was something that brought people together. you heard people talking about it at the cafes, park playground, people who do not always pay attention. in that $0.10, it was the best thing we could have done for city government, even though it was a little bit messy. it was a lot of fun and an eye

opener. it got people interested again.

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>> hi. we'd like to welcome you to our brown bag lunch talk today. we do this every third thursday in san francisco. and today we are at e&e electric, 1775 mission street, right by the building department office where we are going to walk around and look at all of this fantastic

equipment. shinny, wonderful stuff. complicated stuff. what could this possibly be used for? we have with us today, david green, senior electrical inspector who is a good friend of mine and a well-known sailor on the san francisco bay. you're going to sail this saturday. and mr. lloyd and mrs. lloyd. thanks for letting us come in here. really appreciate it. you're an electrical contractor, too. right? >> i'm electrical for 26 years. we do lots of big projects. we dot lots of industrial and commercial and residential. >> so you have to get a california special license.

you have to be a special licensee to do electrical what is that license? >> yes. i have a c-10 licen and b license. >> b is a general contractor's license. >> yes. more interesting for me, i do a lot of c-10 for electrical. >> about three, four years ago you opened up a supply house. >> we opened e & e electric for around five years. >> you don't have so many guys out on the field any more. >> no more. i just have a lot of contractors. they come in for a lot of questions about national code. so if i understand, i tell them whatever i know. my knowledge. >> i think it's actually terrific that the person selling the equipment is somebody who is trained and experienced and has been working the field for so many years. >> i try to do my best.

if i know, i tell them. >> and you can always call david. whatever he needs. david has the answers to all of it. so what we're going to do is walk around. i think what we want to do is start at the area where power, electricity comes into the building. how does it get into the building and what are the pieces you need to make that happen? and then walk us through the building and how you might construct a building with all of the electrical fixtures and fittings and devices. and it's all here. so let's walk out to the front where we have all the pipes and so on that you bring the power into the building. look at all of this stuff. an acorn plant. >> a gutter connector. an unbelievable number of things. so here we are at a place where we have all of these big pipes. so let's walk over here. david, come with me here. what are we looking at here? what's going on?

>> this is a metal conduit made out of aluminum. it's lightweight. that's the advantage. it's used for service conduits to take up the power from pg&e down to the meter. >> so on the outside of buildings sometimes you'll have the wires coming over from pg&e. >> the service drop. >> and i brought something called -- >> a weather head. >> weather head. here it is. >> so at the top you have the weather head. and the conductors come into the service drop. >> look at the front of the weather head. you see these little knockouts here. you knock it out and you run your service conductors. >> and the conductors go down the pipe. >> in san francisco we have special requirements for service entrance equipment because of the corrosive marine environment. right? >> that's correct. >> so what are some of our special local requirements? >> well, we require the conduit to either be aluminum rigid conduit or galvanized steel

conduit. both of them, galvanized or aluminum, they are resis tonight corrosion. pg & e also has a rule, inch and a quarter minimum if they're going to attach the service drop to the conduit. because of that the standard minimum size is an inch and a quarter. >> ok. and that's typically necessary for any home, an inch and a quarter. >> in san francisco, yes. >> everybody is always saying that they want to have enough power to run all of their modern households. how much power typically does it take to run a household in our time? >> the proposed for single residence is 100 amps. unless you're using high-powered plineses that is more adequate for even a medium sized or even large house. when you start using electric cooking, electric heating, jacuzzis, steam, steam units, then you get up into a high use

equipment. then your service has to increase to 125, 150 or 200. >> so you might have to step up to a bigger conduit >> as the service size gets bigger, the conduit gets bigger. >> and so what is this gie gigantic piece of equipment like? >> so this machine here. you brought the machine to cut. up to four inches. >> up to four inches you can cut it. >> cut and thread. >> and thread it as well. so you can take this solid pipe, thread it, fit it exactly. >> take the 10-foot piece. cut it shorter and thread it. >> we can cut and thread it. yeah. >> that's two inches. >> yeah, two inches. >> and you have a much bigger -- >> silver head. two inches. >> excellent. really good. and then here we have over here plastic. what do you use plastic for when you bring power into the building? >> that's not plastic. that's a nonmetallic rigid

conduit. >> excuse me. it's not plastic but it's not metal. what is it? >> it's made out of p.v.c. and is suitable for underground for services and feeders and for pulling conductors in under the ground. >> i know in my neighborhood, in the inner sunset, we just had all of our utilities undergrounded so what used -- you know, one of these overhead service entrances is now underground that would have been the stuff that they switch it to. >> that's the cost effective method. >> excellent. >> when you put in a service, you also have to ground it. you connect it to the cold water pipe. you have to run supplementry round rods. this is a typical ground rod. it's actually seized in copper, a steel round rod with a copper coating. you have to drive it into the ground so that eight feet is in contact with the earth. >> one of the allowed methods of grounding. is that correct? >> for a single family residence that tiply is made

only out of wood and has one water bite, you are required to supplement that water bipe a ground rod. >> how about if you use these other methods? >> if you have a concrete encased etec trode, pouring a footing and you have the opportunity to put the wire in the footing, you do not need the ground rod. >> so the code has a number of different ways you can provide grounding to a building. this is one. this is probably the most common method, except for new buildings where they actually bury the copper ground into the footing, into the concrete footing and attach it to the steel reinforcing part. this is one of the most common. but there are a lot of different ways that you can solve these problems. and the codes, not just the electrical codes but all the codes. give us different ways to deal with problem-solving. so this is a very common way. and then somehow we have to figure out how to connect this to the house so that severing ground in the house, so you don't get a shock when you touch stuff. >> we have an example of a small residential service, the

combination meter sock yet. -- socket and disconnect. where you put 100 or 125-amp circuit breaker in here. the inch and the quarter pipe comes down on the top. typically this is mounted outside and you put the meter in. >> let's look down inside it here. so the power is coming down in the top it he's going down -- >> well it he's going down and terminates and pg &e puts the meter in. you take the wires out of the bottom. >> and go to disconnect. we will see in a minute else wrx -- elsewhere. what's this hole for over here? especially where the power is coming out. >> it could come out or you could seal this. >> or you could seal it. by the way, the cover parts, i can't have empty holes or you have mice and stuff live inning side your electrical equipment. >> that's correct. >> so this is for a typical house. this is 125 max. >> my guess will be 125-amp max. and this one is what we see for a big operation, like a restaurant or a commercial

space. or even a multiple apartment building so here we have a six-gang meter sock eight ray. -- socket array. hold that there and here is where the power comes in. and here you can disconnect or connect the power, 400-amp power. the power would come from here over into our meter. what do you call this thing? >> i always call it the meter enclose you're. for example it might be suitable for five residential units and one board. would be the typical use for this piece of equipment. >> an interesting thing happening in the state of california right now. looking at six meters. many buildings have one meter, and yet for energy efficiency and for billing purposes, it helps to separate out the meter so you know how much each space is using. there's been a big issue about

the so-called submeetering. we're going to see in a little while some new sub meetering equipment. but this is a method which is cost efficient because it allows each person to get their own bill. when you get your own bill, you know you want to keep your billow. where as if the rental unit came power and you don't pay a separate electrical bill, you might not be quite as careful. >> i believe the current public utilities commission code does require all individual residential units to be individually meters. that's for all new work. >> and for commercial, they allow separate submetering. ok. so we brought the power into the building. we're watching our fingers here. we have other ways we'll seat meters >> we have examples, a wide variety of metering and service

equipment that can be chosen. the reason i wanted to show you this is to show you this new meter socket to allow the panel board to face the user in the garage and allow the meter reader to see it. >> excellent. why didn't somebody think of that before? >> i have no idea. there it is. >> little ideas that come to you in the middle of the night. so one of the things that david said is it's allowed to be used in san francisco. there's a really big piece of this whole puzzle about what equipment can be used x which is what is allowed and who decides what is allowed? so there are three stages to figuring out what is allowed. the first stage is something called testing, where somebody tests the piece of equipment to see if it meets some standard test requirement. astm or some other standard test requirement. then there's something called listing, the second part. where some listing agency, and

the federal government approves listing agencies, has looked at all the test results and then issue as a report that says if this piece of equipment, whatever it is -- like this wonderful new connector -- is used -- >> cupeling. >> excuse me. is used in accordance with the following specific requirement, it will meet the requirements of the following. in other words, the listing says if you do it the right way, we can assure that you this will meet some standards. right? is that more or less correct? >> correct >> and the third part of that -- we have testing, listing. and then the third part is approval. and approval is something that's done at the local level here at the city of san francisco. we typically approve a listed product. like this kupling. occasionally we have somebody come forward saying, look, i have the listing. we say, that's great. but we don't allow to you use it here in san francisco. either the local law doesn't allow that kind of product or that kind of material, or we don't think it's safe.

and i could give you some examples of that but basically 99% of the time we approve a list of products which has been tested, listed, and then approved by david or me. basically it's on behalf of the director of the department of building inspection. is that a good example? >> that's it. >> and day have i spends a lot of his time look at listings. tell us what this s. >> this is a cupling for electric metallic tubing. it's quite a large one. but the neat thing about this one is that it has a waterproof seal. it does not leak. this is a new advance in the industry. previously the fittings leaked and caused problems and now they're coming out with problems that don't leak. >> the codes require it be water -- >> the code requires all of these fittings outside subject to the rain be rain-proof.

now the industries gradually are responding and providing rain-proof products. >> so my recollection is that we have damp proof and water proof. what is rain-proof? >> equipment can be suitable for use in a dry location. be suitable for use in the damp location or suitable in the wet location. the reason i say rain-proof is because the product standard and the code requires that the fittings for electric metallic tubing be capable of staying dry when they're south a spray of rain. >> i see. ok. i get it. >> and therefore suitable for use in the wet locations. >> wet locations. ok. good. interesting. who makes this, by the way? >> mr. loy? >> who makes this? >> american fittings. >> oh, yeah. e.m.t. only, four-inch, wet location. shows a little u.l. stamp on it.

>> i have to add for the small fittings, when you can't put those marks on, you have to go to the box. it says it on the box. >> there's nonmetallic cable for you. it's the white stuff. and the yellow stuff. >> what's the dinches between white and yellow? >> white is 14-gauge wire. in san francisco, it's not used in commercials. the national code it's restricted to type five, wooden construction. >> this gauge up to 15 amp is

used for your typical plug loads. >> this wire is used for the laundry, the circuits and the other slightly larger -- >> is there a piece sticking out here? it's noticeably bigger? >> no. not noticeably bigger. >> it has actually multiple conductors in it. three conductors >> three conductors. it's got a white conductor that's called the neutral. a black conductor that's called the ungroud grounded wire, hot wire. and it's got a conductor that's called the ground wire. >> let's take a-- it must take a lot of that wire in the house. >> yes, it does. here we have another wiring method. it's called electrical metallic tubing. it's a tubing that the wire is pulled in after the installation of the tubing versus the cable that i showed

you before. >> so this is electrical metallic tubing. people call it e.m.t. it's a half-inch e.m.t. so you would put this in first and then pull the wire in later >> that's correct. >> it doesn't come prewired. >> this is to use a commercial application. and for fire alarm systems. >> but not typically in residential ices. >> not usually used in residential, wood frame construction. >> i see. >> look at this this is unbelievable. look at all the equipment you have. how can you have so much inventory? this must cost a fortune to stock all of this inventory. >> because, you know, doing contractor before. we know what you can use and what can you not use. so we know older equipment here, lots of contractors, they need it. and right away.

>> so somebody who's come out of the industry as a contractor doesn't stock equipment that nobody's ever going to buy. he's stocking stuff people are gooding to come to buy. he knows exactly what they need to use. that's a very smart business strategy. excellent idea. you've got some metal conduit. what is that? >> it's a cable. it's metal-clad cable. it's a product used, our m.c. cable. metal clad cable, m.c. cable. it's what's used in commercial work. it's a tougher product. than the non-metallic cable. >> let's open it up and see what we got here. how many conductors? >> in this particular one there's four. >> show us what these conductors are. these are standards colors of different kinds of conductors. tell us what they are. >> let's start with the white conductor which is the grounded

conductor or the neutral. the two hot wires are ungrounded conductors. the ones that will give you a shock. and the green one is the grounding conductor. it does not normally carry electricity. >> so the ground wire, or whatever you want to call it, is always green. is that right? that's right. >> and green may only be used for the grounding conductor and for no other color as white may only be used for the neutral or grounded conductor. and other colors may be used -- other colors other than white or green may be used. >> and those typically are black and red when you start. then if you have more conductors, you use other colors. but typically the red or the black. >> in the residences, it's black, black and red. and commercial work where you have 12208, it's black, red, blue. and if you go downtown, the 480 volts, it's brown, orange, yellow. boy. >> and one people with us today just asked a question. is there any reason why you can't wire the entire house with the heavier gauge wire

rather than just the lighter gauge for the 15 amp circuits and the heavier gauge for the 20 amp cirçoyd, come up here and is there any reason why you can't wire it all with a heavier gauge wire? >> yes. because it's a 15 amp and the yellow is 20 amp. but some people are asking if they can use only yellow. you can do that >> you can overdo. you can't under do it. >> yes. >> some people want to save money and use 14 for 15 amp and there are limbs. >> and that raises an interesting points about the codes. the codes are actually a minimum standard. they're not a maximum standard. you can build many things way beyond the code. you can make things much better. the code tells you the lowest level it was acceptable for health and safety.

>> yes. >> you have the wire that pull into the conduit, black, white. >> a minimum for a circuit, you would pull these two wires and a piece of v.m.t. or any conduit. back here, for the 480 volts, orange. >> right. and then we probably have some green here to ground this stuff someplace. >> hopefully we do. there it is. there it is. my goodness, show me that green. i want to see the green. there we go. there is our ground wire. it's interesting, the grounding is to important in buildings. everything has to be grounded and interestingly enough i remember reading years ago about hospitals and medical facilities, den at all offices and things, every single recentable needs an independent ground. >> it's called a redundant ground. speaking of which -- >> pull that out here. >> this is hospital grade m.c. cable. it's designed with two grounds

and it's made for den at all care offices and -- den at all care offices and -- dental care offices and extra care rooms. >> extra care goes into these areas. what is the conductor made of in here? >> copper. >> copper is very valuable these days, right? and people strip out wire and sell it as copper to the recycling places i hear. >> that is stealing the copper because it is so high. so a lot of it outside, they're stealing copper. >> so do people come in and buy wire to replace what they stole? >> yes. >> oh, boy, what a terrible thing. here is a general duty safety switch. this is a nonfuse disconnect,