NFPA 99 Isolation Panels
NFPA 99 isolation panels supply ungrounded power to wet procedure locations such as operating rooms, cath labs, and delivery rooms, so a single fault to ground doesn't create a shock or spark hazard. NLS sources and supplies isolation panels built to NFPA 99 Category 1 and UL 1047 for Saudi MOH and private hospital projects.
An NFPA 99 isolation panel is a factory-assembled enclosure that combines a medical isolation transformer, a line isolation monitor, and branch circuit breakers to feed an ungrounded electrical system into a Category 1 space, the class NFPA 99 assigns to wet procedure locations where a conductive liquid and an electrical hazard can occur together, operating rooms, cardiac catheterization labs, and delivery rooms among them. In a normal grounded system a single line-to-ground fault trips a breaker. In an ungrounded isolated system, that same fault doesn't create a fault current path at all, so power stays on and a procedure isn't interrupted while a second, unrelated fault is found and cleared.
Panel sizing runs from small single-transformer units in the 3-5kVA range for a minor procedure room up to 10-25kVA for a full operating theatre carrying imaging and surgical equipment loads. Circuit breakers on the panel are typically rated to match the branch circuits serving fixed equipment, ceiling pendants, and floor receptacles inside the room, with the isolation transformer's secondary winding forming the isolated conductors that the line isolation monitor watches continuously.
NLS sources NFPA 99 isolation panels, and the isolation transformers and monitors that go inside them, from manufacturers building to NFPA 99 Category 1 requirements and UL 1047 as the equipment standard for isolated power supply systems. This sits inside the wider hospital electrical infrastructure NLS supplies into Saudi MOH and private hospital projects, where wet procedure locations need a documented isolated power design well before the first equipment order goes out.
Procurement usually starts from the electrical single-line diagram and the room schedule: how many isolated branch circuits per theatre, what kVA rating the transformer needs, and whether a remote LIM display is required at the theatre entrance. NLS returns pricing in USD against that data, with delivery timed to the MEP contractor's rough-in schedule rather than a single shipment that arrives before the room is ready to receive it.
Specifications
- ✓Category: NFPA 99 Category 1 wet procedure location isolated power equipment
- ✓Configuration: isolation transformer, line isolation monitor (LIM), and branch circuit breakers in one enclosure
- ✓Typical ratings: 3kVA to 25kVA depending on room type and connected load
- ✓Standards referenced: NFPA 99 Chapter 6, UL 1047 for isolated power supply equipment
- ✓Output: ungrounded isolated conductors feeding fixed equipment, pendants, and receptacles in the space
- ✓Optional: remote LIM annunciator panel at the room entrance
Frequently Asked Questions
What is an NFPA 99 isolation panel used for?+
It feeds an ungrounded electrical system into a wet procedure location like an operating room, so a single fault to ground doesn't cut power during a live procedure. A line isolation monitor tracks the system continuously and alarms if a fault appears.
Who supplies NFPA 99 isolation panels in Saudi Arabia?+
NLS sources isolation panels built to NFPA 99 Category 1 and UL 1047 for Saudi hospital projects, working from the electrical single-line and room schedule to size the transformer and branch circuits before quoting.
What size isolation panel does an operating room need?+
Most single operating rooms run on a 5-10kVA isolation transformer, with larger theatres carrying heavy imaging equipment sized up to 25kVA. The exact rating comes from the connected load schedule, not a fixed rule of thumb.