You're right, it's tough to give an exact time for these tasks during a bid. There are too many variables. However, we can break down the tasks and provide estimated ranges to help you build a reasonable bid.

Factors influencing time



Experience of the electrician

A highly experienced electrician will be faster and more efficient.

Condition of the gear

Old, corroded equipment can be difficult to work with.

Accessibility

How easily can the electrician access the breaker and wiring? Tight spaces add time.

Documentation

Having accurate drawings and instructions saves time.

Tool availability

Having the right tools on hand is critical.

Safety procedures

Thorough safety procedures add time but are essential.

Unexpected issues

This is where time estimates can really get thrown off. A stripped screw, a broken part, a wiring issue, etc.

Need for a helper

Does the electrician need assistance lifting, holding, or positioning the breaker?

Assumptions

Power is already shut off and the area is properly locked out/tagged out (LOTO).

This is CRITICAL and the most time-consuming part of the entire process (preparation). I'm assuming this is not included in your estimated time. The breaker is relatively accessible and in good condition. The electrician is experienced and familiar with this type of equipment. No major surprises are encountered.

Removing a 200A Non-Drawout Breaker


Preparation

Verify LOTO, visually inspect the breaker and surrounding area, prepare tools (screw drivers, voltage tester, etc.). This is already performed.2.

Disconnecting wires

Loosen and disconnect the incoming and outgoing conductors from the breaker.3.

Removing the breaker

Unbolt or unscrew the breaker from its mounting. Carefully remove the breaker from the panel. This may require some maneuvering.4.

Cleanup

Cap or insulate any exposed wires.

Estimated Time

1.5 - 3 hours.

Installing a 300A Non-Drawout Breaker


Preparation

Verify the new breaker is the correct type and rating. Inspect the breaker for any damage. This is already performed.2.

Mounting the breaker

Position the new breaker in the panel. Secure it with bolts or screws. Ensure it is properly aligned and seated.3.

Connecting wires

Connect the incoming and outgoing conductors to the breaker. Torque connections to specifications.4.

Verification

Double-check all connections. Verify correct voltage and phasing (AFTER POWER IS RE-ESTABLISHED by qualified person).5.

Testing

Function testing (if possible while in safe mode).

Estimated Time

2 - 4 hours. This can easily increase if modifications to the bus bars or wiring are needed to accommodate the larger breaker.

Important Considerations for Bidding



Contingency

Add a contingency to your bid to cover unexpected issues. A 10-20% contingency is reasonable.

Site Visit

If possible, perform a site visit to assess the condition of the gear and accessibility.

Assumptions

Clearly state your assumptions in your bid. For example, "Price assumes existing wiring is adequate for the 300A breaker and no modifications are required." and "Price assumes LOTO is completed prior to arrival."

Materials

Include the cost of any necessary materials, such as wire connectors, lugs, or labeling.

Permits

Determine if a permit is required and include the cost in your bid.

Travel Time

Don't forget to factor in travel time to and from the job site.

Example Bid Language

"This bid is based on the assumption that the existing wiring is sufficient for the 300A breaker and no modifications to the bus bars or wiring are required. Any modifications will be quoted separately. The price also assumes that the equipment is accessible and in good condition, and that proper lockout/tagout procedures have been completed prior to our arrival. Price includes labor to remove the existing 200A breaker and install the new 300A breaker, as well as necessary materials. A 15% contingency has been added to cover unforeseen issues."

Key Takeaway: Experience matters. If you're not sure, consult with an experienced electrician to get their input on the time estimate. A site visit is always best when possible. And communicate your assumptions clearly in your bid. Flag for review