SIC 3620 — ELECTRICAL INDUSTRIAL APPARATUS

Frequently asked questions

What is NAICS 3620?

NAICS 3620 is the North American Industry Classification System code for ELECTRICAL INDUSTRIAL APPARATUS. It classifies this business activity for statistical, regulatory, and government procurement purposes. Federal agencies use NAICS codes to collect and publish data about the US economy, determine SBA size standards, and set aside contracts for small businesses.

What licenses and permits does a ELECTRICAL INDUSTRIAL APPARATUS need?

A ELECTRICAL INDUSTRIAL APPARATUS typically needs a local business license, a federal EIN from the IRS, and industry-specific permits depending on the sector. Check with your city or county clerk for a general business license, your state's professional or industry licensing board for any required occupational licenses, and your state's tax authority for a sales tax permit if you sell taxable goods or services.

How do I register a ELECTRICAL INDUSTRIAL APPARATUS business in the United States?

To register a ELECTRICAL INDUSTRIAL APPARATUS business, first choose your legal structure: sole proprietorship (simplest, uses SSN), LLC (personal liability protection, files with your Secretary of State), or corporation (Form 1120 or 1120-S). Register your business name (DBA) with your county if operating under a trade name. Obtain an EIN from the IRS at irs.gov/ein. Register with your state revenue department for any applicable taxes.

What tax forms does a ELECTRICAL INDUSTRIAL APPARATUS file with the IRS?

Tax forms depend on your entity type. A sole proprietor files Schedule C with Form 1040 and Schedule SE for self-employment tax (15.3%). An LLC taxed as a partnership files Form 1065 with Schedule K-1s. A C-Corporation files Form 1120 (21% flat rate). An S-Corporation files Form 1120-S. All businesses paying employees file Form 940 (FUTA) annually and Form 941 quarterly. Estimated tax payments are made via Form 1040-ES four times per year.

Is ELECTRICAL INDUSTRIAL APPARATUS the right NAICS code for my business?

Your NAICS code should reflect your primary business activity — the one generating the most revenue or value. If ELECTRICAL INDUSTRIAL APPARATUS describes your main line of business, NAICS 3620 is likely correct. If you have multiple distinct activities, you may need separate codes for statistical reporting. For federal contracting, your SAM.gov registration should use the code that best matches the work you perform. Review the official NAICS 3620 description and exclusions to confirm it fits your operations.

Does a ELECTRICAL INDUSTRIAL APPARATUS need a contractor bond?

Most states require contractor license bonds (also called surety bonds) ranging from $5,000 to $100,000+ depending on license classification and project value. The bond protects consumers if the contractor fails to complete work per the contract or violates license law. Bond premiums typically cost 1-3% of the bond amount annually. Additional payment and performance bonds may be required on public works projects under the Miller Act (federal) or Little Miller Acts (state).

How does a ELECTRICAL INDUSTRIAL APPARATUS pull permits for construction work?

Building permits are obtained from the local building department (city or county) where the work is performed. Only the licensed contractor or property owner (in owner-builder situations) may pull permits. You'll submit plans, site drawings, and engineering calculations if required. Permit fees are typically based on project valuation. Inspections are required at key stages (foundation, rough framing, rough electrical/plumbing, final). Working without a required permit can result in stop-work orders, fines, and difficulty selling the property.

What EPA lead-safe certification does a ELECTRICAL INDUSTRIAL APPARATUS need?

Under the EPA Renovation, Repair and Painting (RRP) Rule, contractors working on pre-1978 homes or child-occupied facilities where lead paint may be disturbed must be EPA Lead-Safe Certified. This requires an 8-hour initial training course from an EPA-accredited provider, firm certification ($300 fee to EPA), and lead-safe work practices (containment, HEPA vacuuming). Recertification is required every 5 years. Violations carry fines up to $41,000 per day.

Does a ELECTRICAL INDUSTRIAL APPARATUS need a contractor license in multiple states?

Contractor licenses are state-specific with limited reciprocity. Many states have partial reciprocity agreements recognizing the exam portion of the license from another state, but you'll still need to apply, pay fees, and may need to pass the state-specific business/law portion. Some states (notably California, Florida, and Arizona) have strict licensing requirements with no reciprocity. Always check the target state's contractor licensing board before performing work across state lines.