Terms of Use

Version terms-2026-11-12. Effective on publication.

PLEASE READ SECTIONS 5, 6, 7, 10 AND 11 CAREFULLY. THEY STATE THAT THE SERVICE IS NOT ENGINEERING, THAT YOU USE IT ENTIRELY AT YOUR OWN RISK, AND THAT OUR LIABILITY TO YOU IS EXCLUDED OR LIMITED.

These Terms of Use (“Terms”) are an agreement between you and Oneline.build (“Oneline.build”, “we”, “us”). They cover the website at oneline.build, the browser tool at app.oneline.build, and everything the tool produces (together, the “Service”).

By opening the editor, creating an account, signing in, or otherwise using the Service, you agree to these Terms. If you use the Service for a company, you agree for that company as well and confirm that you have authority to bind it, and “you” includes that company. If you do not agree, do not use the Service.

1. The Service is free

The Service is free today. If we introduce charges, we will tell you before they apply, and you can export your drawings first. We may change the Service, add or remove features, or stop running it at any time, with or without notice. Where we reasonably can, we will tell you in advance so you can export your drawings. Keep your own copies of anything that matters to you.

You can start drawing without an account. A drawing made that way stays only in your browser: we hold no copy and cannot recover it. You need to register with an e-mail address to export a PDF or CSV or run the preliminary fault current calculation.

2. Your account

You sign in through our authentication provider. Keep your sign-in private and tell us if you think someone else is using it. You must be at least 18, and you use the Service for business or professional purposes, not as a consumer. Each workspace belongs to one organization, and you decide who else joins it.

3. Your drawings and data belong to you

Everything you enter and everything the tool draws from it (the electrical model, the drawings, the schedules, the exports) is yours. You give us only the permission we need to store it, show it back to you, export it, back it up and keep the Service running. We do not sell it, share it with other users, or use it to train anything.

We look at the contents of your project only when:

• you request a quote (section 8),
• you ask us for help and we need to see it to help you, or
• we have to, to keep the Service secure or because the law requires it.

4. When we contact you

We contact you only about things you asked for (a quote request, a support question) and about the Service itself (an outage, a security matter, a change to these Terms). We do not send marketing e-mail.

5. The Service is not engineering, and does not replace a professional engineer

THE SERVICE IS A DRAFTING AID. IT IS NOT ENGINEERING, AND IT DOES NOT PROVIDE ENGINEERING, DESIGN, CONSULTING OR OTHER PROFESSIONAL SERVICES.

NOTHING THE SERVICE PRODUCES IS SEALED, STAMPED, SIGNED, CERTIFIED, REVIEWED OR APPROVED BY A LICENSED PROFESSIONAL ENGINEER. THE SERVICE IS NOT A SUBSTITUTE FOR A LICENSED PROFESSIONAL ENGINEER WHO REVIEWS, SEALS AND STAMPS THE DRAWINGS.

In particular:

• Using the Service does not create an engineer-client relationship, or any professional or fiduciary relationship or duty, between you and us or anyone connected with us. This is so even if a person connected with the Service holds a professional license. No such person is acting as your engineer or as engineer of record when you use the Service.
• You are solely responsible for deciding whether a licensed professional engineer must prepare, review, seal or stamp your work, and for engaging one. You are also solely responsible for meeting every law, code, standard, permit requirement, contract term and requirement of an authority having jurisdiction that applies to your project.
• Do not issue, submit or build from anything the Service produces, or rely on it for the selection, rating, installation, protection or operation of equipment or for the safety of any person or property, until a qualified person has independently checked it and, where required, a licensed professional engineer has reviewed, sealed and stamped it.
• Electrical work can cause death, serious injury, fire and property damage. Nothing the Service produces tells you that any equipment or installation is safe or compliant.

6. Defaults, calculations and drawings may be wrong

The Service fills in values you did not enter so you can draw quickly, and it generates drawings, feeder sizes, labels, schedules and exports from them. ANY OF THESE, INCLUDING VALUES THE SERVICE FILLS IN, FEEDER AND CONDUCTOR SIZES, RATINGS, SYMBOLS, CONNECTIONS, SCHEDULES AND EXPORTS, MAY BE INCOMPLETE, OUT OF DATE OR WRONG FOR YOUR PROJECT, AND THE SERVICE MAY NOT DETECT OR WARN YOU OF AN ERROR. A warning, a check or the absence of a warning means nothing about correctness or compliance. You are responsible for checking every value and every drawing before you use it.

Preliminary fault current. Where the Service offers a Preliminary Three-Phase Symmetrical Fault Current, it is a first look computed from the values in your model, many of which may be defaults. It is not a short-circuit study, an arc flash study, a coordination study, an equipment rating, a short-circuit current rating (SCCR), a breaker duty check or a pass/fail. It is not certified, sealed or reviewed by an engineer. Do not rely on it to select equipment, set protective devices, make labels, judge whether anything is safe, or show compliance with any code or standard. The actual fault current at a real installation can be higher than the preliminary value.

Anything you share. If you give anything from the Service to anyone else (a customer, a contractor, an inspector, an authority), you are responsible for it, for telling them what it is and is not, and for any reliance they place on it.

7. Provided “as is”; use at your own risk

YOUR USE OF THE SERVICE AND YOUR RELIANCE ON ANYTHING IT PRODUCES ARE ENTIRELY AT YOUR OWN RISK. YOU ASSUME ALL RISK OF LOSS, DAMAGE, INJURY OR DEATH THAT ARISES FROM THEM.

THE SERVICE AND EVERYTHING IT PRODUCES ARE PROVIDED “AS IS” AND “AS AVAILABLE”, WITH ALL FAULTS AND WITHOUT WARRANTY OF ANY KIND. TO THE FULLEST EXTENT THE LAW ALLOWS, WE DISCLAIM ALL WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, INCLUDING ANY WARRANTY OF ACCURACY, CORRECTNESS, COMPLETENESS, RELIABILITY, MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, NON-INFRINGEMENT, AND COMPLIANCE WITH ANY LAW, CODE OR STANDARD. WE DO NOT WARRANT THAT THE SERVICE WILL BE UNINTERRUPTED, SECURE OR ERROR-FREE, OR THAT YOUR DATA WILL NOT BE LOST. No advice or information you receive from us creates a warranty. Keep your own copies of your work.

8. Requesting a quote for engineering services

We offer stamped and sealed fault current studies, arc flash studies with equipment labels, and related engineering services, each quoted separately for its scope. A study is sealed only by a professional engineer licensed in the project’s jurisdiction. The tool is not one of those services, and requesting a quote does not make us your engineer.

When you request a quote from inside the tool:

• with your consent (a checkbox in the request form), the tool takes a snapshot of that project’s electrical model and drawing at that moment and attaches it to your request, together with the contact details you typed;
• the snapshot is stored with the request and is seen only by the people who prepare the quote; later edits to your project do not change it;
• we reply by e-mail. A quote is an offer for a separate engagement with its own written agreement. No professional services start, and no professional duty arises, until both of us have signed or accepted that agreement in writing, and only that agreement governs those services;
• we keep the request and its snapshot for as long as we need to honor the quote, then for 3 years, or until you ask us to delete them, including after you delete the project, unless the law requires us to keep them.

9. Fair use

Use the Service for your own drawings. Do not try to reach another organization’s projects, overload the Service, probe its security, or copy the tool itself. We may limit, suspend or close any account, at any time, including one that breaks these Terms.

10. Limitation of liability

TO THE FULLEST EXTENT THE LAW ALLOWS, THE “ONELINE.BUILD PARTIES” (ONELINE.BUILD AND ITS OWNERS, OPERATORS, EMPLOYEES, ENGINEERS, CONTRACTORS, AGENTS, SUCCESSORS AND SUPPLIERS, INCLUDING ANY INDIVIDUAL WHO OWNS OR OPERATES THE SERVICE) ARE NOT LIABLE FOR THE CORRECTNESS OF ANY DRAWING, VALUE, CALCULATION, SCHEDULE OR EXPORT, OR FOR ANY LOSS OR CLAIM ARISING FROM OR RELATED TO THE SERVICE, ANYTHING IT PRODUCES, OR ANY RELIANCE ON IT, BY YOU OR BY ANYONE ELSE.

THIS INCLUDES, TO THAT EXTENT, ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, EXEMPLARY OR PUNITIVE DAMAGES; LOST PROFITS, REVENUE, BUSINESS OR DATA; REWORK, DELAY OR REPLACEMENT OF EQUIPMENT; PROPERTY DAMAGE; AND PERSONAL INJURY OR DEATH. IT APPLIES WHATEVER THE LEGAL THEORY (CONTRACT, TORT, NEGLIGENCE, STRICT LIABILITY, PROFESSIONAL LIABILITY OR OTHERWISE), AND EVEN IF WE WERE TOLD SUCH A LOSS WAS POSSIBLE OR A REMEDY FAILS OF ITS ESSENTIAL PURPOSE.

IF ANY OF THE ONELINE.BUILD PARTIES IS NONETHELESS FOUND LIABLE, THE TOTAL LIABILITY OF ALL OF THEM TOGETHER, FOR ALL CLAIMS, WILL NOT EXCEED ONE HUNDRED U.S. DOLLARS (US$100).

You agree that the Service is free because of these limits, and that we would not offer it without them. Nothing in these Terms excludes or limits liability that the applicable law does not allow to be excluded or limited; in that case our liability is limited to the smallest amount the law allows.

11. Your indemnity to us

To the fullest extent the law allows, you will defend, indemnify and hold harmless the Oneline.build Parties from all claims, damages, losses, liabilities, costs and expenses (including reasonable attorneys’ fees) brought by any third party, or for any injury, death or property damage, that arise from or relate to: your use of the Service; anything you produce with it, issue, share or build from; any project, installation or equipment it relates to; or your breach of these Terms.

12. Changes to these Terms

We may change these Terms. When we do, we publish a new version with a new date at the same address. Continuing to use the Service after that means you accept the new version, and we may also ask you to accept it the next time you sign in.

13. Governing law and disputes

These Terms are governed by the laws of the State of Wisconsin, without regard to its conflict-of-law rules. Any dispute arising from these Terms or the Service will be brought only in the state or federal courts located in that State, and you and we consent to their jurisdiction. TO THE FULLEST EXTENT THE LAW ALLOWS, YOU AND WE EACH WAIVE ANY RIGHT TO A JURY TRIAL, AND ANY CLAIM MUST BE BROUGHT ONLY IN YOUR OWN INDIVIDUAL CAPACITY, NOT AS PART OF A CLASS OR REPRESENTATIVE ACTION.

14. Everything else

These Terms are the entire agreement between you and us about the Service, except that a separately signed engagement for engineering services (section 8) governs those services. If part of these Terms cannot be enforced, the rest stays in force, and that part is enforced as far as the law allows. If we do not enforce a term, we have not waived it. You may not transfer these Terms; we may. Sections 3 and 5 to 14 survive after you stop using the Service.

15. Contact

privacy@oneline.build. For privacy questions, see the Privacy Policy.