An owner’s rep should ask a temporary power provider about nine things: the size range on offer, delivery and mobilization, the fuel plan, the response when a unit fails, paralleling, distribution and protection, documentation, extension terms, and insurance with site safety coordination. A provider who answers each with specifics, and who says plainly when an answer depends on the contract or the site, is easier to plan around. This guide covers construction-phase temporary and bridging power only.
Our companion page on temporary and bridging power for data center construction explains which loads run during a build and how bridging works. This page takes the other side of the table and gives you the questions to ask before you sign. OSHA’s 1926.404 standard calls for approved ground-fault circuit interrupters on 120-volt, single-phase, 15- and 20-ampere receptacle outlets on construction sites, or an assured equipment grounding program, so protection belongs on the list from day one.
The vetting table at a glance
The table below lists the nine question groups in the order a procurement conversation tends to follow. Each row pairs a question with what a good answer includes and the reason it matters on a build. Treat an answer that is vague, or that avoids the contract, as a prompt for a written follow-up.
| Question | What a good answer includes | Why it matters |
|---|---|---|
| Which sizes are available for my start date and later stages? | Units named by kW, a split between what is available now and what must be arranged, and a request for your load list | A build outgrows its first unit |
| What do you need on site to deliver, place and start a unit? | Pad, access and hookup needs, who places and starts the unit, and a lead time quoted with its conditions | Mobilization delays push back every trade waiting on power |
| Who supplies fuel, and how are levels monitored? | A named party, a refill schedule tied to your load, tank options and a spill plan | A diesel unit that runs dry stops work |
| What happens when a unit stops overnight? | A contact path, who dispatches, and whether the remedy is repair or replacement, stated in the agreement | Outage cost lands on your schedule |
| Can units be paralleled and added in stages? | Compatible models, controls, redundancy options and lead time | Capacity needs step up as commissioning loads arrive |
| What distribution and protection come with the unit? | Cabling, panels and breakers supplied, plus who handles grounding and GFCI at each connection | Power must arrive usable and safe |
| What records will I receive? | Agreement terms, unit specifications and service or inspection records the provider keeps | Owners and auditors may ask for them |
| How are extensions and shift changes handled? | Notice required, whether rates carry over, and how single, double or triple shift billing applies | Schedules move |
| What insurance do you carry, and how do you coordinate with site safety? | A certificate of insurance matching your contract and compliance with site orientation and procedures | Your contract may set minimums |
Capacity and range
Stag’s fleet runs from 20 kW to 2000 kW, billed by single, double or triple shift, and the yard is in Dickinson, TX. A data center build rarely holds one load, so ask which sizes are available for your start date and which would need to be arranged for later stages. Availability on a given date changes with demand, which makes it a question to put to Stag directly. Bring a stage-by-stage load list, as described in the construction site generator sizing guide, so the answer is tied to numbers. How that load steps up as each hall is energized is covered in phased data hall energization and generator needs.
Delivery and fuel
Delivery questions are about conditions as much as dates. Ask what the provider needs from you at the pad, such as access, ground preparation and a hookup point, and who handles placement and startup. Lead times depend on unit size, configuration and demand, so request any quoted figure in writing along with its assumptions. For fuel, ask who supplies it, how levels are monitored and how refills are scheduled against your load, because a diesel unit that runs dry stops the trades it feeds. Spill containment and who responds to a leak are worth settling before the first fill.
When a unit fails
Every machine can fail, so the useful question is what the provider does next. Ask for the contact path, who dispatches, and whether the remedy is a field repair or a replacement unit. Any response-time commitment should appear in the agreement, since a verbal promise is hard to enforce. Stag’s specific response process is one to put to the provider directly, and this page does not state one. Our page on where a temporary power plan fails on a data center build covers the other seams that tend to break a plan beyond the generator itself.
Paralleling, distribution and protection
Capacity needs on a data center build tend to step up as trades and commissioning loads arrive. Ask whether the provider can parallel units, which models are compatible and what lead time applies to a paralleled setup. Our guide to paralleling generator rentals for scalable power explains the concept for large facilities. Whether a given combination is available for your dates is a question for Stag.
Distribution decides whether the power arrives usable. Ask what cabling, panels and breakers come with the unit, and who is responsible for grounding and protection at each connection. The OSHA language on permanent, continuous grounding paths, and on GFCI protection or an assured equipment grounding program, is a useful reference point, and your site safety plan may add requirements. Stag’s power distribution page is the place to start asking what equipment can accompany a generator.
Documentation, extensions and insurance
Paper matters as much as hardware once a build is audited. Before award, ask the provider to confirm in writing what it will supply and how changes are handled. The list below covers items owner’s reps often want settled, and each should be checked against the contract. Which of them Stag provides is a matter for the quote.
- Rental agreement terms, including how single, double or triple shift billing applies to your run hours
- Unit specifications and any inspection or service records the provider keeps
- Extension terms: notice required, whether rates carry over, and what happens if the unit is needed elsewhere
- A certificate of insurance that matches your contract requirements
- Site safety coordination: orientation, lockout and tagout practices, and refueling procedures
- Return and demobilization conditions
Billing by single, double or triple shift is worth confirming early, since the shift level you choose will shape the cost. The generator rental pricing guide covers how rental pricing is structured. Dollar figures come only from a quote.
Taking the list to Stag
Stag Power Rentals operates from a yard in Dickinson, TX, with diesel generators from 20 kW to 2000 kW billed by single, double or triple shift. Bring this list to the first call and ask each question as written. Where an answer depends on your site, your contract or the dates involved, expect it to come back with conditions attached. Our construction industry overview gives the wider picture for building projects, and the quote form is where to send your load list and schedule.
Frequently Asked Questions
What should an owner’s rep ask first?
Start with capacity measured against your load list, since every other answer depends on it. Then ask what happens when a unit fails, because an outage on a build lands on your schedule. Bring a stage-by-stage load list so the answers are specific rather than general.
Does this apply to permanent backup power?
No. This page covers construction-phase temporary and bridging power only. Permanent systems for operating facilities involve different design and acceptance questions. Treat a temporary rental as a bridge until the permanent system and utility connection are ready, subject to your project plan.
Can a provider guarantee a response time?
Only if the commitment is written into the agreement. Ask for any response terms in the contract rather than relying on conversation. Stag’s terms are one to put to the provider directly. Compare them with what your schedule can tolerate.
How does shift billing affect an extension?
Stag bills by single, double or triple shift, so a change in daily run hours may change the shift level that applies. Ask how notice, rate carryover and extension periods are handled. Terms vary by contract, and the quote is where they are set.
Who is responsible for grounding and GFCI protection?
Responsibility is set by the contract and the site safety plan, so ask for it in writing. OSHA 1926.404 requires approved GFCI protection or an assured equipment grounding program for certain receptacle outlets on construction sites. A qualified person on your team should confirm what applies to your jurisdiction and project.