The United States Equestrian Team beat the French team in the international jumper class last night after failing to do so for three nights at the Washington International Horse Show at Capital Centre.

Jay Land, 22, of Atlanta put Illico through the 11-fence course in 45.82 seconds to put the USET back in the team competition, raising its score to 14 points. France still tops the standings with 37 after winning the first three international events.

Land, 1986 rookie of the year, took the lead with nine of the 36 entries remaining in the class. The key was taking one less stride going into the final fence to save time, he said.

"He's a fabulous speed horse. I could tell it was a good course for him because he's a speed horse," said Land. "We won it at the last jump. There were no options except there. I took seven strides and everyone else took eight."

France's Hubert Bourdy, on Milou de Subligny, winners Tuesday in the Gambler's Stake, followed the leader in a quick, faultless race but fell .39 of a second short of a second victory.

Debbie Shaffner of Ambler, Pa., on Gero, took the lead midway through the event with a 46.85 finish. Henri Prudent, an individual rider representing his native France, rode Pensato to fourth in 47.25.

Earlier, Chris Kappler of St. Charles, Ill., rode Warrent to first place finish in the intermediate jumpers power and speed class. The event featured 24 entries racing through 13 fence attempts for the least amount of faults and the fastest time.

Kappler, in his second year of jumping competition, cleared each fence quickly in a 34.4-second total to win the $2,000 event. Eric Hasbrouck of Rhode Island rode Brewster to a faultless second place in 35.2. New Jersey's Tim Grubb finished third on Activate in 35.77.

Rodney Jenkins of Rapidan, Va., a member of the United States Equestrian Team and the nation's leading show jumping rider, was fourth atop Heisman in 36.54.

In the hunter division, Two For One, ridden by Tommy Serio of Baltimore and owned by Mrs. Haywood Nelms of Charlottesville, won the $1,500 regular conformation hunter stake to secure the championship with 28 points. The defending champion 8-year-old bay gelding topped 15 other entries, including Bavaria, the reserve titlist scoring 17 points with rider Lise Quintero.

Whadyasay scored 15 points in winning three classes to gain regular working hunter honors. Katie Monahan Prudent, currently the leading national rider here with 10 points, rode the 8-year-old bay gelding for Willow Wood and Mrs. Lawrence Rachuba of Marriottsville, Md. Bavaria won the reserve ribbon in that class, too.