3/0 Wire Buyers in Pennsylvania

3/0 carries 167,800 circular mils and is the size most often associated with a 200 A service in copper. It sits between 2/0 and 4/0 in the zero series, and each step in that series adds about a quarter more area, which is why a design change of one size is common and a substitution on a drawing is not. Because it is heavy enough to need two people on a full reel, most of it moves on pallets rather than by hand.

In Pennsylvania it turns up in service upgrades, feeder runs to mechanical equipment, and grounding work where a large service needs a grounding electrode conductor. Contractors buy it on 500 foot reels for service work, and plants buy it for feeders between a switchboard and a distribution panel. Both leave partial reels behind. Utility service work adds a smaller stream, mostly aluminum 3/0 laterals that come back to a yard when a service is upgraded from an older panel.

Circular mils	167,800, about 0.132 square inches of conductor area
Stranding	19 wires in standard concentric strand, with compact strand common in aluminum
Ampacity framework	NEC Table 310.16 lists 200 A for copper at 75 degrees C and 155 A for aluminum
Forms	THHN and XHHW-2 singles, 3/0 within SER cable, and bare 3/0 for grounding
Typical uses	200 A services and feeders, meter mains, subpanels and large equipment circuits

Where 3/0 sits in the feeder range

Three sizes in the zero series cover most small to medium service work: 2/0 for 125 A to 150 A, 3/0 for 200 A, and 4/0 for 200 A in aluminum or for feeders that need margin. The pattern holds because the ampacity table steps in roughly 25 A increments through this range, so a change of one size moves the usable load by about one breaker size.

Voltage drop changes that arithmetic. A 200 A feeder running 300 feet may need 4/0 or larger to keep drop within limits, which is why a job designed around 3/0 sometimes ends with a larger size installed and the 3/0 reel returned to the shop unused.

• 3/0 copper covers 200 A at 75 degrees C
• Aluminum 3/0 is listed at 155 A, so it lands lower
• Long runs often push the design up one size
• Unused reels from upsized feeders are common surplus

3/0 in plant and commercial work

Commercial service upgrades are the largest source. A strip center, a small office building or a restaurant going from 100 A to 200 A will use 3/0 copper or 4/0 aluminum, and the contractor buys a full reel for a run of 120 feet. The remainder goes back on the shelf and eventually into a surplus pile.

Plants use 3/0 for feeders to distribution panels, air compressors and process equipment, and for the grounding electrode conductor on larger services where the table calls for 3/0. Bare 3/0 copper is almost always sold on metal value, since its only job is to carry fault current to earth.

• 200 A service upgrades at commercial buildings
• Feeders to distribution panels and compressors
• Bare 3/0 grounding electrode conductors
• Equipment circuits on older plant distribution

How a 3/0 reel is valued

At this size the copper content is substantial, so the metal value is a real floor rather than a rounding error. That said, a sealed 500 foot reel of 3/0 THHN is worth well above scrap, because a contractor can put it straight into a service. The gap between wire value and metal value is the whole reason to sell rather than scrap.

Insulation and color affect placement. Black and red move fastest, blue and white less so, and green is usually grounding work with a narrower market. XHHW-2 in 3/0 carries a premium over THHN in wet locations, while bare 3/0 is priced almost entirely on weight.

• Sealed reels priced as usable wire
• Black and red easiest to place
• XHHW-2 preferred for wet locations
• Bare 3/0 valued on copper weight

Storage risks for 3/0 wire

Thick conductors resist kinking better than small ones, but they are heavy, and a dropped reel of 3/0 can crush the outer wraps against the flange. Once a conductor is bent past its limit the damage is permanent, and a buyer will look for flat spots along the outer layer.

Moisture and sunlight work slowly. Reels kept outdoors collect water between the wraps, and the outer layer may show corrosion under a jacket that looks intact from a distance. Indoor storage with the reel off the floor is the best case, and it is worth mentioning when it applies.

• Crushed outer wraps from dropped reels
• Water trapped between wraps outdoors
• Corrosion under an intact looking jacket
• Flange damage that lets the coil spread

Photos and paperwork for a 3/0 lot

Photograph the reel tag and the print, then the conductor end and the outer surface. If the wire is bare, a close photograph of the strand surface shows corrosion clearly. For a lot, one wide shot plus a count by color and length is enough to start.

Send the footage per reel, the insulation type and the storage history. Purchase invoices are useful for establishing age, particularly on XHHW-2 where the compound has changed over the years. A quote follows the review, and pickup arrangements are made after it is accepted.

• Tag, print and conductor end
• Close photograph of bare strand surface
• Footage by reel and color
• Storage history and purchase date if known

What we buy in this category

• 3/0 copper THHN and THWN-2 reels
• 3/0 aluminum XHHW-2 and SER cable
• Bare 3/0 copper grounding conductor
• 3/0 in URD and service entrance assemblies
• Partial reels from service upgrades
• Sealed factory reels with legible tags
• Mixed color lots from contractor shops
• Plant feeder cable containing 3/0

Selling 3/0 wire in Pennsylvania

From the Route 202 corridor to the Mon Valley and the I-81 warehouse belt, 3/0 wire is stored in shops and yards all over the state. Send the city or township, the access details and the photographs, and the pickup can be planned against the real site.

• Philadelphia
• Norristown
• King of Prussia
• Pottstown
• Lansdale
• Abington
• Cheltenham
• Lower Merion