Underground Electrical Service Cable Sizes & Amps Q&APOST a QUESTION or COMMENT about buried or underground electrical service entry cabling or wiring
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FAQs about buried or underground electrical service entry cable ampacity & underground electrical service ampacity ratings.

You are watching: What size wire for 200 amp service 100 feet away


Deneen, actually you are far-more "clued-in" than people who just run wires willy-nilly without trying to find out what is needed. An underground electrical service can be run in conduit (special pipe used for electrial wiring) or it can be run directly if the proper UF or underground feeder wire type is purchased. The wire size you need depends on the size of electrical service (main panel and switch) to be installed; for a small home you"d typically use at least a 100-Amp rated electrical service and panel.The wire size you need is going to be given in electrical codes, selected by your installing electrical contractor, based on BOTH the Ampacity (say 100A) and the total wire length - where your length of 150 ft. is pretty long, and is also described atSE CABLE & BRANCH CIRCUIT WIRE SIZES vs AMPS The table of wire sizes I"ll show below is excerpted from that web page. You"ll see that for 100A the service entry cable is typically a #1 or a #0 gauge wire depending on whether you"re using copper (smaller diameter wire) or aluminum wire.BUTwhen running the service entry cable for a longer distance, like your 150 feet, it will be wire size 2/0 - copper or 4/0 aluminum. (More zeroes is a larger wire size).Examples of wire sizes for longer runs are also at SE CABLE & WIRE SIZES FOR LONG RUNS https://jajalger2018.org/electric/Long-Run-SEC-Cable-Sizes.phpThe wire TYPE you will need is one rated for burial underground and will be marked at least UF for "Underground Feeder"There are additional letters and markings that reflect more wire properties like temperature range; Watch out: if you are not familiar with proper, safe electrical wiring, making a mistake can cause a fire or kill someone. So be sure you have help from a qualified electrician. Also in most communities you"re required to get an electrical permit to do or have done the work you describe. The electrical inspector"s visits and inspections are there to help keep you and everyone else safe so be sure you get those done.

What size of and type of conduit and service wire do I need for a small home, we are burring it underground from electric meter to home around 150 ft.i am a female that is totally clueless about these things. I need help

Ineed to know what size of service wire. And conduit I need for service from meter to home. I am burring it underground. From meter to home around 100 ft

ToddSE CABLE SIZES FOR LONG WIRE RUNS - SEE THIS ARTICLE for wire size for long runshttps://jajalger2018.org/electric/Long-Run-SEC-Cable-Sizes.php

I need to run underground wire 300 ft. to a cabin with a 150 amp panel from my barn. What type and size wire will I need?

Normally yes;

Does the underground power company wiring size need to be changed when going from 100 to 200 amp service?

I have a 250 foot run from the primary pole to the meter box. I have a 225 amp breaker box. What gauge wire do I need for the primary run and the meter to breaker box?

TimCheck outSE CABLE SIZES FOR LONG WIRE RUNS - SEE THIS ARTICLE for wire size for long runs at https://jajalger2018.org/electric/Long-Run-SEC-Cable-Sizes.phpand don"t hesitate to ask if that leaves you with questionsThanks

I"m putting underground electric service to my house. I have 200 amp service. I need 200 feet of underground. What size wire do I need.

GregUsing the online calculator itself cited at the article I"ll cite just below to support a 200A load at the end of the runyou"d see an acceptable (under 3%) voltage drop of 2.80% with 350 kcmil wire

PROVIDED you"re running 2 parallel sets of 240VAC cables, single phase power. you"ll find wire sized for long SEC runs documented at SE CABLE & WIRE SIZES FOR LONG RUNS

Illustration: edited from output from Southwire"s voltage drop calculator at southwire.com

I have a 650" run from the service pole and I"m not sure with the voltage drop what size wire is needed for a 200 amp service.

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DaryllBe sure you have the necessary permits, approvals, inspections as that will help your installation be safe.See SE CABLE & WIRE SIZES FOR LONG RUNS for help with wire sizing.

I"m replacing a old box with new 200 amp box and running 300 foot to new trailer can anyone give me any advice

Need to run a 200 amp service from pole to new house, 800" underground. What size wire?

Sue please see the wire sizing help including run length and wire size increases are atSE CABLE & BRANCH CIRCUIT WIRE SIZES vs AMPS

What sz of direct burial wire for 200 amp service, 200" away coming from on the ground transformer?

PaulMOre-detailed wire sizing help including run length and wire size increases are atSE CABLE & BRANCH CIRCUIT WIRE SIZES vs AMPS

Need to carry 100 amps 500 feet. What size under ground wire do I need

See the voltage drop info atSE CABLE & BRANCH CIRCUIT WIRE SIZES vs AMPS

Sorry 400 feet under ground

What size wire do I Need to go 400 feet for a 200 amp service?

200amp service at 300ft underground what size wire do I need

Can you provide wiring size information for 200 amp underground service with a 450 foot run.Thanks...Continue readingat UNDERGROUND SERVICE LATERALS - topic home or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX.

Or see these Articles on Building Electrical Service Wiring - SEC Cabling AMPS VOLTS DETERMINATION - home ELECTRICAL INSPECTOR SAFETY PROCEDURES SERVICE ENTRY WIRING & AMPACITY - home ELECTRICAL SERVICE ENTRY DAMAGE SE CABLE & BRANCH CIRCUIT WIRE SIZES vs AMPS SE CABLE & WIRE SIZES FOR LONG RUNS - SEE THIS ARTICLE for wire size for long runs SERVICE AMPACITY SERVICE DROP SERVICE GROUNDING DEFECTS UNDERGROUND SERVICE LATERALS SIZE of WIRE REQUIRED for ELECTRICAL RECEPTACLESSuggested citation for this web pageUNDERGROUND SERVICE LATERAL FAQs at jajalger2018.org - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice.

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